The most common reason for this happening is that the file was damaged because of early removal of a USB drive, or a disconnected network drive.
If the file is actually damaged to this extent, no, it can’t be fixed. The data is just not there to decrypt it.
It can also happen when users mistakenly rename non-AxCrypt files to end with .axx, in which case renaming back to it’s appropriate extension will fix the issue since the file was never encrypted in the first place in this scenario.
This error is BS, these files have been in a desktop folder, opened once, after that it gives these errors! Now all my encrypted files I encrypted using AxCrypt show this error I’m out ALL of my passwords! I’ve done NOTHING to the files!!!!!!