Action handler returned invalid data.

import DontEditWarning from '~/components/DontEditWarning.astro'

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

What went wrong?

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

See Also:

Actions handler reference