Inline completion failed on the server side: AttributeError: 'NoneType' object has no attribute 'ainvoke'

[BwL1289]

Description

After Enable Completions by Jupyternaut is enabled, I see the following error:

Inline completion failed on the server side

Traceback (most recent call last): File "/usr/local/lib/python3.10/dist-packages/jupyter_ai/completions/handlers/base.py", 
line 130, in handle_request_and_catch await handle_request File "/usr/local/lib/python3.10/dist-packages/jupyter_ai/completions/handlers/base.py", 
line 158, in _handle_request await self.handle_request(request) File "/usr/local/lib/python3.10/dist-packages/jupyter_ai/completions/handlers/default.py", 
line 43, in handle_request suggestion = await self.llm_chain.ainvoke(input=model_arguments) AttributeError: 'NoneType' object has no attribute 'ainvoke'

Reproduce

1. Install jupyter-ai
2. Fire up a new server
3. Click Enable Completions by Jupyternaut
4. See error above

Expected behavior

Inline completion should work without issue

Context

• Operating System and version: Amz Linux 2023
• Browser and version: Chrome Version 122.0.6261.129
• JupyterLab version: 4.1.2
• JupyterAI version: 2.10.0

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[krassowski]

Did you select a LLM? I think the problem is that the frontend should not send requests until a model is selected (and maybe print a nice error message in the notification).

[BwL1289]

That's it - thanks @krassowski. I think the nice error message "Please select an LLM" is sufficient to notify users they forgot to select a model.

Will close this issue. Appreciate the help.

[krassowski]

Reopening as it still needs fixing.