[BUG] Orgnization Plugins Not Syncing (Failed to trigger sync.)

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?

Using Claude Team plan we have an internal plugin marketplace that contains all of our internal core plugins for our business (for Claude.AI, Cowork, Code, etc). This was set up in April of 2026, and updated numerous times in April.

Today we updated the marketplace again and went to the plugin admin (https://claude.ai/admin-settings/plugins) and clicked "Re-sync" to resync the available plugins.

This fails shortly after with "Failed to trigger sync."

<img width="536" height="146" alt="Image" src="https://github.com/user-attachments/assets/fa72bde2-4e23-4dea-8579-f479b507358e" />

The plugin has an error badge above it and when hovered over it we see this:

<img width="868" height="450" alt="Image" src="https://github.com/user-attachments/assets/430e02d1-6838-47da-b174-8b91b18b3f7a" />

We have chatted with the "Fin AI Agent" support and verified that the GitHub Claude App has access to all our repos. We have validated that there are no connection issues. We have even removed the plugin and then attempted to add it again. Upon re-adding the plugin it fails again. We have even disconnected the GitHub connector and then re-connected it with no remedy to the situation. The issue persists.

The AI Agent support in the admin was no longer able to help and stated a bug report needed to be filed here.

What Should Happen?

When clicking "Re-sync" the plugins should sync.

Error Messages/Logs

Authentication with GitHub failed. Check that the Claude GitHub App is installed on this repository.

GitHub authentication failed. The Claude GitHub App is not installed on this repository. Install it to grant access.

Last attempted: May 6, 2026 at 4:46 PM

Steps to Reproduce

1. On our account, go here: https://claude.ai/admin-settings/plugins
2. Click "Re-sync"
3. Error appears.

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

web/desktop

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Other

Additional Information

This is on the desktop and on claude.ai