[BUG] SSH remote connection fails with "All configured authentication methods failed" after Desktop update to v1.2581.0.0 (Windows MSIX)

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

After updating Claude Desktop to v1.2581.0.0 on Windows (MSIX), all SSH remote connections fail with "All configured authentication methods failed". This affects all existing SSH configs that worked perfectly before the update. No changes were made to server configuration or ssh_configs.json.

What Should Happen?

SSH remote connections should work as they did before the update. Password authentication to the remote server should succeed.

Error Messages/Logs

All configured authentication methods failed

Steps to Reproduce

1. Have a working SSH remote connection configured in Claude Desktop (password authentication, custom port 20022)
2. Update Claude Desktop to v1.2581.0.0 (Windows MSIX)
3. Attempt to connect to any previously working SSH remote session
4. "All configured authentication methods failed" error appears

Environment:

• OS: Windows (MSIX installation)
• Claude Desktop Version: 1.2581.0.0
• SSH auth method: Password
• SSH Port: 20022
• All configs in ssh_configs.json are intact and correct
• Issue started immediately after the Desktop app update
• Connections that worked before update now all fail

Claude Model

Not sure / Multiple models

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

1.2581.0.0

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

WSL (Windows Subsystem for Linux)

Additional Information

Additionally, after the update, the option to delete existing SSH configurations has disappeared from the UI. Only the option to add new SSH connections is available, making it impossible to remove or manage existing configs.