Error creating chat MessaagePort connection

What version of the Codex App are you using (From “About Codex” dialog)?

26.9

What subscription do you have?

Pro

What platform is your computer?

uname -mprs

What issue are you seeing?

I’m experiencing a recurring “MessagePort connection” error in the Codex desktop app on macOS.

Recent messages in a long-running conversation fail to load or appear in the chat. The assistant seems to retain context from those exchanges, but I cannot reliably see the latest messages or responses.

I have already tried:

Closing and reopening the app.

Uninstalling and reinstalling the app.

The problem persists after both steps.

This conversation contains extensive project work, design approvals, and references to locally saved files. I’m concerned about losing access to the conversation history and would like to troubleshoot this without deleting local app data or project files.

Could you help identify the cause and restore reliable loading of the conversation? Please let me know which diagnostic logs or app version details you need.

What steps can reproduce the bug?

Feedback ID: 01a03f2b-f292-7f61-9964-6ec06ff01cc8

What is the expected behavior?

No response

Additional information

No response

No source files, tests, or entry points are named. Start by reviewing the issue details and Feedback ID 01a03f2b-f292-7f61-9964-6ec06ff01cc8, then inspect the available diagnostic logs for the MessagePort error. Done means identifying the cause and restoring reliable loading of recent conversation messages without deleting local app or project data.