Hunting I/O errors

Hi, I am using Cryptomator 1.15.2 on windows 11 and had already some adventures setting up my vault, which I explain here: Recover files without master key and vault - #2 by pagin

I cannot access many of my files with the following error:

Meanwhile, the underlying files of my vault, as per the file system’s edit date, have never changed since I embarked, so I think that the data should be fine. All directory and file names are correct, so I seem to have the correct key for my files, even if I needed to reconstitute it after it got lost somehow.

New files which I created meanwhile are perfectly accessible.

Does anyone have an idea about how I can access my old files?

Thanks
Philippe