Fix InternalServerError

✅ Solution

InternalServerError in litellm often arises from incorrect parameter passing to the model provider, especially during fallbacks or custom API calls. To fix, carefully inspect the request payload against the provider's API documentation and ensure only supported parameters are included, particularly when using virtual keys or router fallbacks. Thoroughly review the code paths used within fallbacks, ensuring parameter mappings and transformations are correct preventing unexpected or hardcoded parameters from being passed.