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gemini-cli - 💡(How to fix) Fix Repeated API 400 error

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Error Message

[API Error: {"error":{"message":"{\n "error": {\n "code": 400,\n "message": "Function call is missing a thought_signature in functionCall parts. This is required no error

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What happened?

[API Error: {"error":{"message":"{\n "error": {\n "code": 400,\n "message": "Function call is missing a thought_signature in functionCall parts. This is required for tools to work correctly, and missing thought_signature may lead to degraded model performance. Additional data, function call default_api:update_topic , position 20. Please refer to https://ai.google.dev/gemini-api/docs/thought-signatures for more details.",\n "status": "INVALID_ARGUMENT"\n }\n}\n","code":400,"status":"Bad Request"}}]

What did you expect to happen?

no error

Client information

<details> <summary>Client Information</summary>

Run gemini to enter the interactive CLI, then run the /about command.

About Gemini CLI │ │ │ │ CLI Version 0.41.2 │ │ Git Commit b0c7a1722 │ │ Model gemini-3.1-pro-preview │ │ Sandbox no sandbox │ │ OS darwin │ │ Auth Method gemini-api-key │ │ IDE Client IDE │ │

</details>

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API keu

Anything else we need to know?

this has been happening all day

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#api#ssr#memory leak#API versioning#request timeout

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