Unable to recover encrypted file. Why?

I am trying to recover some files that were mistakenly deleted.

These files were encrypted using EFS.

Recuva can find the files but cannot recover them, giving the error: unable to recover encrypted file.

So i was wondering why can’t it recover encrypted files? These are still just files, no?

I have the encryption certificates and can decrypt them, but only if i have the files themselves of course.

I’ve found some other software solutions that can recover EFS encrypted files, but these can’t find the concerning files…