Claude Desktop 1.1.4173 crashes on startup — no window renders, process visible in Task Manager

Found 2 possible duplicate issues:

1. https://github.com/anthropics/claude-code/issues/28271
2. https://github.com/anthropics/claude-code/issues/28270

This issue will be automatically closed as a duplicate in 3 days.

• If your issue is a duplicate, please close it and 👍 the existing issue instead
• To prevent auto-closure, add a comment or 👎 this comment

🤖 Generated with Claude Code

Claude Desktop version 1.1.4173 (CCD 2.1.51) fails to create/show any window on launch. The app processes start (4 Electron processes visible in Task Manager) but no window appears — MainWindowHandle is 0 for all processes. The root cause is an unhandled @formatjs/intl error thrown during startup that prevents the BrowserWindow from being created.

Rolling back to version 1.1.4088 (CCD 2.1.49) resolves the issue — the window opens normally.

This error originated either by throwing inside of an async function without a catch block,
or by rejecting a promise which was not handled with .catch(). The promise rejected with the reason:
Error: [@formatjs/intl] An `id` must be provided to format a message. You can either:
1. Configure your build toolchain with [babel-plugin-formatjs](https://formatjs.io/docs/tooling/babel-plugin)
or [@formatjs/ts-transformer](https://formatjs.io/docs/tooling/ts-transformer) OR
2. Configure your `eslint` config to include [eslint-plugin-formatjs](https://formatjs.io/docs/tooling/linter#enforce-id)
to autofix this issue
    at nZe (app.asar\.vite\build\index.js:83:2748)
    at Sae (app.asar\.vite\build\index.js:83:4203)
    at WOt (app.asar\.vite\build\index.js:705:12468)
    at RDe (app.asar\.vite\build\index.js:705:14365)
    at Hd (app.asar\.vite\build\index.js:705:15535)
    at EventEmitter.<anonymous> (app.asar\.vite\build\index.js:1234:79020)

• Sentry log confirms the error:

[error] Sentry caught: {
  eventId: '4afb8d3e76b9454893d8aa5ac892e102',
  type: 'Error',
  value: '[@formatjs/intl] An `id` must be provided to format a message. ...',
  stack: undefined
}

Troubleshooting Attempted

• Clearing all cache/session data (Cache, Code Cache, Session Storage, Local Storage, IndexedDB, blob_storage, Network, WebStorage) — did NOT fix
• Clean reinstall of 1.1.4173 from the cached .nupkg package — did NOT fix (same error, confirming it's not a corrupted update)
• Rolling back to 1.1.4088 — FIXED the issue, window opens normally

Environment

• App version: 1.1.4173 (commit 12766c56e46a0f6bf202bfa397fceafe4468d7de)
• CCD version: 2.1.51
• Working version: 1.1.4088 (CCD 2.1.49)
• OS: Windows 11 Pro 10.0.26200
• CPU: AMD Ryzen 9 5950X 16-Core
• RAM: 32 GB
• Display: ASUS PG32UCDP 2560x1440 @ 240Hz, 1.5x scaling
• Node version (Electron bundled): 24.13.0
• Locale: en-US (config.json)

Workaround

Delete the app-1.1.4173 folder from the installation directory (%LOCALAPPDATA%\AnthropicClaude\) so the Squirrel launcher falls back to the previous working version (1.1.4088). Note: the auto-updater may re-download 1.1.4173.

Additional Context

The @formatjs/intl error suggests a missing message id in an internationalization call within the bundled app code. Since the error has stack: undefined in the Sentry report and throws as an unhandled promise rejection, it likely crashes the main process initialization before BrowserWindow creation. The error fires twice on each launch attempt. Version 1.1.4088 with CCD 2.1.49 does not have this error.

Same issue 1.1.4173 will not start. No previous version available.

@Duanes-Tech-Hub I don't suggest downloading from unofficial websites. Please check #28271 for proper workarounds

I got a link from another thread, I also did not have a previous version to use and thought the recommendation via Claude Web was an official site. I should have realized. Thanks

Caused the issue by clicking the reinstall dropdown when prompted after clicking the greyed out cowork button. Program hung with dropdown open, upon restarting, encountered the above bug. Deleting appdata folders and reinstalling 1.1.4010.0 got it working again. Claude thinks based on logs it was failing to load GUI based on this line from the log:

[@formatjs/intl] An 'id' must be provided to format a message

Same issue here. Claude Desktop 1.1.4173 on Windows 11 25H2 (Build 26200.7623), Intel Core Ultra 9 275HX, dual GPU (Intel Graphics + NVIDIA RTX 5080 Laptop).
Process spawns 4 instances in Task Manager (0% CPU, ~190MB total), no window renders. Frameless Electron window means nothing is visible at all when the renderer fails.
Root cause confirmed via verbose logging:
& "$env:LOCALAPPDATA\AnthropicClaude\claude.exe" --enable-logging --v=1
Produces two unhandled promise rejections:
Error: [@formatjs/intl] An id must be provided to format a message.
at nZe (...\app.asar\.vite\build\index.js:83:2748)
at Sae (...\app.asar\.vite\build\index.js:83:4203)
at WOt (...\app.asar\.vite\build\index.js:705:12468)
The compiled Vite bundle has a missing message ID in the i18n layer. The renderer crashes before painting, but the main process stays alive — hence the "running but invisible" behaviour.
What I've ruled out:

• --disable-gpu flag — no effect
• --lang=en-US flag — no effect
• Setting intl.accept_languages in Preferences — no effect
• Full uninstall + delete %APPDATA%\Claude + delete %LOCALAPPDATA%\AnthropicClaude + restart + reinstall — no effect
• Mixed DPI scaling (3 monitors, 1.5x + 1.0x + 1.0x) — not the cause, formatjs error occurs regardless

This is a build defect in 1.1.4173, not environment-specific configuration. Needs a patched release.

Same issue here. v1.1.4173, Windows 11 25H2 (Build 26200), AMD Ryzen 9 3900X, 32GB RAM.
The main.log reveals the likely root cause. The app never creates a BrowserWindow. Here's the sequence:

App starts and initializes services (CCD, IdleManager, Chrome Extension MCP, etc.)
Two @formatjs/intl errors fire immediately before any window is created:

[@formatjs/intl] An id must be provided to format a message.

On the first launch attempt, the app triggers beforeQuit within the same second it started, never rendering a window
A second instance auto-starts, initializes services again, logs desktop_windows_elevation_detected with elevation_type: 'limited', then goes silent after flushing events. Still no window.

The @formatjs/intl error appears to be a build-level i18n bug: a message string is missing its ID, which would crash the Electron renderer before it can paint. This isn't something users can fix on their end.
What I've tried (none resolved it):

Full uninstall/reinstall
Renaming %APPDATA%\Claude to force fresh state
Enabling Windows Developer Mode
Multiple reboots

System: Windows 11 Pro 25H2 (10.0.26200), AMD Ryzen 9 3900X, 32GB RAM, x64

<html>
<body>
<!--StartFragment--><html><head></head><body><h2>Confirming: v1.1.4173 crashes on startup — no window renders (Windows 10 x64, Squirrel install)</h2>
<h3>Environment</h3>
<ul>
<li><strong>OS</strong>: Windows 10 Pro 22H2 (Build 10.0.19045), x64</li>
<li><strong>CPU</strong>: Intel Core i7-10700 @ 2.90GHz</li>
<li><strong>RAM</strong>: 64 GB</li>
<li><strong>Claude Desktop Version</strong>: 1.1.4173 (Squirrel installer, non-MSIX)</li>
<li><strong>Previous Working Version</strong>: 1.1.3189</li>
<li><strong>Node Version (bundled)</strong>: 24.13.0</li>
</ul>
<h3>Symptoms</h3>
<p>After auto-updating from v1.1.3189 to v1.1.4173, the application process starts (visible in Task Manager) but <strong>no window or UI is ever rendered</strong>. The app silently fails on every launch attempt.</p>
<p>v1.1.3189 was working perfectly before the auto-update. Unfortunately, the Squirrel updater deleted v1.1.3189 during the upgrade, making rollback impossible.</p>
<h3>Root Cause from Logs</h3>
<p>Every launch of v1.1.4173 produces the following <code>@formatjs/intl</code> error <strong>before any UI is created</strong>:</p>
<pre><code>[error] Sentry caught: {
eventId: '...',
type: 'Error',
value: '[@formatjs/intl] An id must be provided to format a message. You can either:\n' +
'1. Configure your build toolchain with [babel-plugin-formatjs]...\n' +
'or [@formatjs/ts-transformer]... OR\n' +
'2. Configure your eslint config to include [eslint-plugin-formatjs]...\n' +
'to autofix this issue',
stack: undefined
}
</code></pre>
<p>This error fires <strong>twice</strong> on every startup. After this error, the app either:</p>
<ol>
<li>Falls through to <code>Not main instance, returning early from app ready</code> (if a zombie process from a previous attempt is still running), or</li>
<li>Reaches the event logging stage (<code>desktop_windows_elevation_detected</code>, <code>desktop_project_detection_completed</code>) but <strong>never renders a window</strong>.</li>
</ol>
<h3>What I've Tried</h3>

Action | Result
-- | --
Kill all Claude processes and relaunch | Same @formatjs/intl error, no window
Full uninstall (Squirrel) + delete %LOCALAPPDATA%\AnthropicClaude + delete %APPDATA%\Claude + reboot + clean reinstall | Same error persists — confirms this is not a cache/config issue
Launch without any MCP config (bare install, no claude_desktop_config.json) | Same error
Run as Administrator (elevation_type: 'full') | Same error
Multiple restart attempts across several hours (~15+ attempts logged) | Consistent failure every time

<h3>Additional Observations</h3>
<ol>
<li>
<p><strong>Squirrel updater deletes previous version</strong>: After upgrading from 1.1.3189 → 1.1.4173, only <code>app-0.9.3</code>, <code>app-0.14.10</code>, and <code>app-1.1.4173</code> remain under <code>%LOCALAPPDATA%\AnthropicClaude\</code>. v1.1.3189 was removed, preventing rollback.</p>
</li>
<li>
<p><strong>VM service errors (non-blocking)</strong>: The logs also show repeated <code>VM service not running. The service failed to start.</code> errors, with the message <code>Skipping VM warm download - YukonSilver not supported (Requires MSIX installation)</code>. This is expected since I'm on the Squirrel install, but these errors do NOT cause the crash — the <code>@formatjs/intl</code> error occurs independently.</p>
</li>
<li>
<p><strong>MSIX not available</strong>: The download page at claude.ai/download only offers the Squirrel (.exe) installer for my system. No MSIX option is provided.</p>
</li>
<li>
<p><strong>Fallback to v0.14.10 is degraded</strong>: The oldest available version (0.14.10) partially works but receives HTTP 403 on <code>challenge_redirect</code>, causing Health Check failures (<code>&lt;!DOCTYPE</code> parsed as JSON). This suggests v0.14.10 is no longer fully supported server-side.</p>
</li>
</ol>
<h3>Impact</h3>
<ul>
<li><strong>Complete loss of Claude Desktop functionality on Windows 10 x64</strong> (Squirrel install)</li>
<li>No rollback path available (Squirrel deleted the working version)</li>
<li>MCP integrations (filesystem, puppeteer, desktop extensions) are inaccessible since they require the Desktop GUI</li>
<li>Forced to use claude.ai in browser as a workaround, losing all local integration capabilities</li>
</ul>
<h3>Request</h3>
<ol>
<li>Please investigate the <code>@formatjs/intl</code> missing message ID error in v1.1.4173 on Windows 10 — it appears to be a build/bundling defect</li>
<li>Consider preserving the previous working version during Squirrel updates to allow user rollback</li>
<li>If possible, provide a direct download link for v1.1.3189 (or the next patched version) so affected users can recover</li>
</ol>
<h3>Relevant Log Excerpt (v1.1.4173 startup)</h3>
<pre><code>2026-02-25 10:13:45 [info] Starting app { appVersion: '1.1.4173', platform: 'win32', arch: 'x64', nodeVersion: '24.13.0' }
2026-02-25 10:13:45 [error] Sentry caught: { type: 'Error', value: '[@formatjs/intl] An id must be provided to format a message...' }
2026-02-25 10:13:45 [error] Sentry caught: { type: 'Error', value: '[@formatjs/intl] An id must be provided to format a message...' }
2026-02-25 10:13:45 [info] [CCD] Initialized with version 2.1.51
2026-02-25 10:13:46 [info] [growthbook] loaded 30 features (30 changed)
2026-02-25 10:13:47 [info] desktop_windows_elevation_detected | elevation_type: 'limited'
2026-02-25 10:13:50 [info] desktop_project_detection_completed
(No further log entries — app hangs with no window rendered)
</code></pre></body></html><!--EndFragment-->
</body>
</html>

Facing same issue as well. Upgrading to the latest version of Claude Code ui app now causes the app to not show any GUI when opened and to appear to be stuck with 4 processes in the background in windows task manager

Same issue. Upgrade to Claude Desktop 1.1.4173, no old version to roll back to. After launch, 4 Claude process running, but no UI. This is on Windows 11 Pro x64.

2026-02-25 05:04:19 [error] Sentry caught: {
eventId: 'cbbfcac2f97646a1a09b643e906b510a',
type: 'Error',
value: '[@formatjs/intl] An id must be provided to format a message. You can either:\n' +
'1. Configure your build toolchain with babel-plugin-formatjs\n' +
'or @formatjs/ts-transformer OR\n' +
'2. Configure your eslint config to include eslint-plugin-formatjs\n' +
'to autofix this issue',
stack: undefined
}

Unfortunately there is no separate repo exposed to file bugs for the desktop app, and all such issues here get marked invalid, so we just have wait for the desktop app developers to take notice.

Same issue here.. (Claude Desktop 1.1.4173)

it is a shame claude did not release a fix for this. wow.

Same issue here, at least there should be an option to rollback to a previous version.

Same issue, didnt have the desktop version before.

This workaround worked for me, and doesn't require any removal or reinstallation of the Claude Desktop App or its data. Just reverts the latest bad version. Run from PowerShell as Admin:

# Kill Claude AND the native host process
Get-Process *claude* -ErrorAction SilentlyContinue | Stop-Process -Force
Get-Process *chrome-native-host* -ErrorAction SilentlyContinue | Stop-Process -Force

# If you are running this as a script, wait a moment for handles to release, then delete
Start-Sleep -Seconds 2

# Finally, the actual clean up
Remove-Item -Recurse -Force "$env:LOCALAPPDATA\AnthropicClaude\app-1.1.4173"

Having the same issue

I'm guessing Claude Code made the update and crashed it! I am dead serious

I'm guessing Claude Code made the update and crashed it! I am dead serious

Yeah, I totally agree, and it it's frustrating. One can easily reach to this conclusion especially since the root cause for the 1.1.4173 crash is literally a missing id field in a function call. That's a one-line fix that's breaking the entire app. I just can't imagine that this is a developer team error.

Bro I use it a lot for work, this is fucked up bruh. I can't go back to the web version where I have to be pasting stuff.

I thought I might have messed up again, I’ve been troubleshooting for hours. I should have searched online sooner. I suppose this is what happens when Anthropic is just vibecoding again.

Hi everyone please check #28271 for the workaround, in particular this and this comments.

RIP to the guys like me that would have to actually ask for admin perms to IT department to run the solution. Ts was meant to be a secret 💔

Windows ARM64, Claude Desktop 1.1.4173, same issue.
Processes visible in Task Manager (4 background processes) but no window opens.
Fresh reinstall did not help. Deleted %appdata%\Anthropic\Claude and %localappdata%\Anthropic\Claude before reinstall — same result.

I found way that is working:

1. Uninstall Claude Code Desktop
2. Go to "C:\Users\<YourUsername>\AppData\Local\AnthropicClaude" and remove it
3. Download Installer from: https://claude.com/download
4. Install and works ok:

<img width="859" height="619" alt="Image" src="https://github.com/user-attachments/assets/5aa31b42-2595-48dc-91f4-0ac2770e1b12" />

I found way that is working: 1. Uninstall Claude Code Desktop 2. Go to "C:\Users<YourUsername>\AppData\Local\AnthropicClaude" and remove it 3. Download Installer from: https://claude.com/download 4. Install and works ok:

Thank you so much for sharing, got me back working!

Same issue happning

This workaround worked for me, and doesn't require any removal or reinstallation of the Claude Desktop App or its data. Just reverts the latest bad version. Run from PowerShell as Admin: # Kill Claude AND the native host process Get-Process claude -ErrorAction SilentlyContinue | Stop-Process -Force Get-Process chrome-native-host -ErrorAction SilentlyContinue | Stop-Process -Force # If you are running this as a script, wait a moment for handles to release, then delete Start-Sleep -Seconds 2 # Finally, the actual clean up Remove-Item -Recurse -Force "$env:LOCALAPPDATA\AnthropicClaude\app-1.1.4173"

That's cool !! Worked very well.

Hi folks, thanks for reporting and sorry for the inconvenience. We're investigating.

We have root-caused this and have a Statuspage up here. I'll prioritize updating that (but will come back to this issue): https://status.claude.com/incidents/d392wcgvxl01

Hey everyone, we just deployed a fixed version in Claude 1.1.4328. Please upgrade if you can or download directly from https://claude.com/download if your window is stuck.

Thank you for your patience and reports!

Fixed it, appreciated.

Hey everyone, we just deployed a fixed version in Claude 1.1.4328. Please upgrade if you can or download directly from https://claude.com/download if your window is stuck. Thank you for your patience and reports!

<img width="229" height="296" alt="Image" src="https://github.com/user-attachments/assets/82f3082a-a8a3-400e-8664-4266880384b3" />

Fixed. Appreciated.

I have been facing the same issue since yesterday.

Tried to launch it today and it would not show up, but showed as running in the task manager. I tried to install the latest version (downloaded from https://claude.com/download), but it errors out:

<img width="407" height="198" alt="Image" src="https://github.com/user-attachments/assets/b23911e1-7dd6-46b9-824b-7e52b35074eb" />

I right-clicked the installer and ran as admin, but the log has the following: (made sure to unblock the file before running):

2026/02/26 08:50:50.928679 MSIX installation failed: AddPackage failed: AddPackage failed with HRESULT 0x80073CFF
2026/02/26 08:50:50.928679 ERROR dialog (opening log): Installation failed: AddPackage failed: AddPackage failed with HRESULT 0x80073CFF

Please share this log with us.
2026/02/26 08:51:06.785989 Elevated process exited with code 1
2026/02/26 08:51:06.785989 Elevation failed: elevated installer exited with code 1
2026/02/26 08:51:06.785989 ERROR dialog (with log path): Administrator access is required to install Claude with full features. You can try again or install without Cowork.

Ended up just running an older version for now (found useful info in this Reddit post):

C:\Users\<username>\AppData\Local\AnthropicClaude\app-1.1.4088

> Hey everyone, we just deployed a fixed version in Claude 1.1.4328. Please upgrade if you can or download directly from https://claude.com/download if your window is stuck. > Thank you for your patience and reports! <img alt="Image" width="229" height="296" src="https://private-user-images.githubusercontent.com/144522179/554950890-82f3082a-a8a3-400e-8664-4266880384b3.png?jwt=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpc3MiOiJnaXRodWIuY29tIiwiYXVkIjoicmF3LmdpdGh1YnVzZXJjb250ZW50LmNvbSIsImtleSI6ImtleTUiLCJleHAiOjE3NzIxMjcwNTIsIm5iZiI6MTc3MjEyNjc1MiwicGF0aCI6Ii8xNDQ1MjIxNzkvNTU0OTUwODkwLTgyZjMwODJhLWE4YTMtNDAwZS04NjY0LTQyNjY4ODAzODRiMy5wbmc_WC1BbXotQWxnb3JpdGhtPUFXUzQtSE1BQy1TSEEyNTYmWC1BbXotQ3JlZGVudGlhbD1BS0lBVkNPRFlMU0E1M1BRSzRaQSUyRjIwMjYwMjI2JTJGdXMtZWFzdC0xJTJGczMlMkZhd3M0X3JlcXVlc3QmWC1BbXotRGF0ZT0yMDI2MDIyNlQxNzI1NTJaJlgtQW16LUV4cGlyZXM9MzAwJlgtQW16LVNpZ25hdHVyZT1iOGZiODVkYTBjYzNiODQ0ZDJmNDUxNDZlZjI0YjI3MmNkOWY3MDQ5ZDBjMTFkMDllNmVlOGIzMDk5ZjQ1OTkwJlgtQW16LVNpZ25lZEhlYWRlcnM9aG9zdCJ9.MSSO34eCYAoPYSg7JAEcAMdZcC3rpK3xvjKu2SCxuyg"> Fixed. Appreciated.

Thx, that solved the problem

> Hey everyone, we just deployed a fixed version in Claude 1.1.4328. Please upgrade if you can or download directly from https://claude.com/download if your window is stuck. > Thank you for your patience and reports! <img alt="Image" width="229" height="296" src="https://private-user-images.githubusercontent.com/144522179/554950890-82f3082a-a8a3-400e-8664-4266880384b3.png?jwt=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpc3MiOiJnaXRodWIuY29tIiwiYXVkIjoicmF3LmdpdGh1YnVzZXJjb250ZW50LmNvbSIsImtleSI6ImtleTUiLCJleHAiOjE3NzIxNjMyNjksIm5iZiI6MTc3MjE2Mjk2OSwicGF0aCI6Ii8xNDQ1MjIxNzkvNTU0OTUwODkwLTgyZjMwODJhLWE4YTMtNDAwZS04NjY0LTQyNjY4ODAzODRiMy5wbmc_WC1BbXotQWxnb3JpdGhtPUFXUzQtSE1BQy1TSEEyNTYmWC1BbXotQ3JlZGVudGlhbD1BS0lBVkNPRFlMU0E1M1BRSzRaQSUyRjIwMjYwMjI3JTJGdXMtZWFzdC0xJTJGczMlMkZhd3M0X3JlcXVlc3QmWC1BbXotRGF0ZT0yMDI2MDIyN1QwMzI5MjlaJlgtQW16LUV4cGlyZXM9MzAwJlgtQW16LVNpZ25hdHVyZT1hY2JkNThiMzFhYTg0NzZiODljZTkwOGEzZjlkOWQyYzQyOTY2NTBhMDQ1NzNjNTkxNzRhNTkyNzEwMTI2NTNhJlgtQW16LVNpZ25lZEhlYWRlcnM9aG9zdCJ9.D8geWbjXJvBZR898vbadIIjwo3UlWO8exOBEqqgna3I"> Fixed. Appreciated.

Fixed for me, too. Thanks

Hey everyone, we just deployed a fixed version in Claude 1.1.4328. Please upgrade if you can or download directly from https://claude.com/download if your window is stuck.

I had to turn on Developer Mode in Windows to 'sideload' this version, I haven't had to do that with previous versions, I'm guessing someone forgot to sign it?