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This is an unmaintained snapshot of the Astro v4 docs. View the latest docs.

Action handler returned invalid data.

ActionsReturnedInvalidDataError: Action handler returned invalid data. Handlers should return serializable data types like objects, arrays, strings, and numbers. Parse error: ERROR

What went wrong?

Section titled What went wrong?

Action handler returned invalid data. Handlers should return serializable data types, and cannot return a Response object.

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