Unexpected Error When Mentioning Assistants (@) – TypeError: Cannot Read Property 'map' of Undefined

[hanna-daoud]

What happened?

When I attempt to mention assistants in the chat by typing @ and selecting one, I receive an unexpected error in the application. The error prevents me from proceeding with the assistant selection and crashes the input field.

Expected Behavior:
I expected to see a list of available assistants and to be able to select one without the application crashing.

Environment:
Branch: Main
Operating System: Ubuntu 24.04
Browser: Chrome Version 128.0.6613.137 (Official Build) (64-bit)
Node.js Version: v20.17.0

Steps to Reproduce

1. Open LibreChat.
2. Start a new chat and type @ in the input field.
3. Try to select any assistant from the dropdown menu.
4. The application crashes, and an error is displayed.

What browsers are you seeing the problem on?

Chrome

Relevant log output

Unexpected Application Error!
Cannot read properties of undefined (reading 'map')
TypeError: Cannot read properties of undefined (reading 'map')
    at Mention (Mention.tsx:159:43)
    at renderWithHooks (chunk-AXVHJUCK.js:21682:26)
    ...

I am running the application in debug mode, and the error occurs in the Mention.tsx file on line 159. Here's the relevant part of the code:

{(matches as MentionOption[]).map((mention, index) => (

Screenshots

Code of Conduct

• I agree to follow this project's Code of Conduct

[danny-avila]

Can't reproduce this:

Recording.2024-09-18.101828.mp4

Some followup questions:

• do you have any assistants created already?
• have you used this successfully before?
  • if so, when did this start?
• This used to be an issue and was fixed here: 🔧 fix(useMentions): handle empty assistant lists #2966
  • is your instance forked and/or do you have the fix from upstream?

[hanna-daoud]

Apparently, after properly setting my OpenAI Assistants API Key, no issue is being faced. But if I do not have an OpenAI Assistants API Key setup, the bug happens.

[danny-avila]

Thanks, I will try that, likely an edge case there