Issues with files after restore

Hi I have a problem with recovered data.

These were deleted and were in the trash. They were recovered from the Recycle Bin.

The data is back now. Problem is that as soon as I want to open one of the files I get error 503.

Folegende constellation:

My Nextcloud stores the data encrypted, encryption module is created.
A folder has been split. Person A has created the folder. Person B stores files in it. And Percson C has deleted files.

Person A has restored it to the recycle bin.

What options do I have? Thank you in advance