TYPO3 Exception 1458745468

Note

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This exception has been introduced together with exception 1458745712, same documentation may apply for this one as well.

TYPO3 10 - 2022-05-19

The Issue

(1/1) #1458745468 UnexpectedValueException

Invalid flex form data structure on field name "pi_flexform" with element "image" in section container "objectFeedback": Nesting inline elements in flex form sections is not allowed.

This exception occurs when nesting a <flux:field.inline.fal> inside a <flux:form.section>. This is not supported anymore since TYPO3 v10.

See https://github.com/FluidTYPO3/flux/issues/1803#issuecomment-697283924

Solution

Rework the content element: Split it into a container element and a sub element that may be added multiple times.