Error2 reports

Fix `MidStreamFallbackError`

in LiteLLM

✅ Solution

This error typically occurs in litellm. Check the example issues for common solutions.

Related Issues

Real GitHub issues where developers encountered this error:

[Bug]: "litellm.MidStreamFallbackError: litellm.APIConnectionError: 'MockValSer' object cannot be converted to 'SchemaSerializer'\nTraceback (most recent call last):Jul 15, 2026

Router mid-stream fallback drops pre-fallback partial token usage from combined usageJul 14, 2026

Timeline

First reported:Jul 14, 2026

Last reported:Jul 15, 2026

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