I have case sensitive problems in TYPO3 v 8.7 LTS. System is sometimes mocking that a file is missing. The error message is
Oops, an error occurred!
File /archiv/ABCD.pdf does not exist.
Allthough the file is there. When I put the file in lowercase to fileadmin "abcd.pdf" than FAL isn't mocking around. But seems after a while it still is mocking. At least I am not understanding where the problem lies. Because even if ABCD.pdf is there and in the right place I get warnings.
I checked DB integrity several times. But still no luck. Afterwards delete the cache in INSTALL TOOL.
I found DB tables where files are stored. Is there a way, that I manually can update this tables and get rid of these error message?
Make sure the checkbox "case sensitive" on the storage is equal to your file system.
Run the FAL index update scheduler task. That should align the DB values again