Breaking: #66034 - Drop Content Adapter ¶
See Issue #66034
The TYPO3 configuration option [FE][activateContentAdapter] and the associated code has been dropped from the TYPO3 core. This option was used to transform FAL fields back to old file fields.
Any installation using TypoScript referring to old file columns as present before TYPO3 CMS 6.x will stop working as expected.
Change your TypoScript to use the new content object FILES to retrieve files.