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CrewAI errors and fixes: 1 guide

Real CrewAI failures, each with the error you'll see, the cause and steps that worked. 0 of 1 fixed upstream. Search within CrewAI.

Workaround: 1

CrewAIWorkaround
Every tool call arrives with empty arguments and fails validation
Each tool call fails with 'Field required ... input_value={}' and the agent repeats until max iterations.
Last checked 2026-10-15#tool-calls#schema3 steps →

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