Error3 reports
Fix ModuleNotFoundError
in LiteLLM
✅ Solution
"ModuleNotFoundError" usually arises when a required Python package isn't installed, or the Python environment is misconfigured. Resolve this by first ensuring the necessary package is installed using `pip install <package_name>` (e.g., `pip install fastapi`). If the package is installed yet still causing problems, verify your Python environment and that the package version is compatible.
Related Issues
Real GitHub issues where developers encountered this error:
[Bug]: Cannot load library 'libsndfile.so'Jan 3, 2026
[Bug]: Module/package conflict in llms package. E.g., ModuleNotFoundError: No module named 'litellm.llms.mistral.chat.transformation'; 'litellm.llms.mistral.chat' is not a packageDec 29, 2025
[Bug]: ModuleNotFoundError: No module named 'fastapi' in python SDKDec 18, 2025
Timeline
First reported:Dec 18, 2025
Last reported:Jan 3, 2026