Exception location

[amaloney]

ALL software version info

Software Version Info

- lumen (main)

Description of expected behavior and the observed behavior

Expected behavior

RuntimeError showing useful information to the user about not having set up a LLM.

ERROR: It looks like a Language Model provider isn't set up yet.
You have a few options to resolve this:

- Set environment variables with an API key: For example, OPENAI_API_KEY or ANTHROPIC_API_KEY.
- Specify a provider and API key directly: For example, set `--provider openai` with your API key via --api-key.
- Custom endpoint: If using an OpenAI-compatible API, set --provider openai and define the --provider-endpoint.

If you still need assistance visit the docs: https://lumen.holoviz.org/lumen_ai/how_to/llm/index.html

Observed behavior

ValueError from not having a provider selected

ERROR: Could not find LLM Provider None, valid providers include: ['openai', 'anthropic', 'mistral', 'azure-openai', 'azure-mistral', 'ai-navigator', 'llama-cpp'].

Complete, minimal, self-contained example code that reproduces the issue

# from fresh install
lumen-ai

• I may be interested in making a pull request to address this