Error type

Schemas and validation

6 guides: 1 fixed, 1 workaround, 1 open.

• AutoGenFixed (verified)

  'str' object has no attribute 'get' when the chat finishes

  The task output prints, then the run crashes with AttributeError: 'str' object has no attribute 'get'.

  Last checked 2026-10-15#schema#error-messages3 steps →
• n8nUnverified

  AI Agent tools fail with 'schema must be type object, got None' after upgrading

  After upgrading, the agent fails before calling any tool.

  Last checked 2026-10-15#regression#tool-calls3 steps →
• browser-useUnverified

  Browser agent keeps emitting empty actions until max steps

  Sometimes the agent outputs an empty action every step until the step limit, even though it read the right data.

  Last checked 2026-10-15#schema#tool-calls3 steps →
• browser-useUnverified

  Browser agent keeps going after it already called done

  In headless mode with a custom structured-output controller, the run never ends after the task is complete.

  Last checked 2026-10-15#loop#schema3 steps →
• 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 →
• n8nOpen

  One bad tool call ends the whole agent run

  The run ends with 'Received tool input did not match expected schema' and the user gets nothing.

  Last checked 2026-10-15#tool-calls#schema3 steps →