Thanks for your input. How can I tell if the file is corrupted and if it is how should I proceed?
Normally, Electrum will detect it upon opening the wallet file.
But since it's the encrypted seed that may be affected, Electrum can't detect if it's corrupted.
Anyways, if you try the post above and it resulted with something like:
............\x02E\xff\xc9\x90\x08\xb5\xac\xdb\xca\x8e\xb1He\xb1He9b6b4?\xfd13320ead,.............
The seed may be corrupted.
Recovering a corrupted file is a job for data professionals and out of my scope, sry.