A few weeks ago, it was functioning properly, but then I encountered a parsing error while opening it.
Despite this issue, I was able to access the wallet successfully several times afterward.
Unfortunately, the parsing error has now become persistent. Is there any way to resolve this issue?
Unfortunately, before you can decrypt the master private key in your wallet file, the wallet file itself needs to decrypted before it
and with the error, it looks like it's not in proper Base64 format, other decrypting tools may result with similar error.
It's rare to hear of parsing error that intermittently fixes itself (
at least for a while).
Perhaps it's an error in your RAM that was the cause of the parsing error, then it persisted once a persistent corrupted encrypted state was saved to your disk.
In any case, it's worth to check for hardware issues first before attempting to use the machine.
Plus your drive may still contain a working version of your wallet file when scanned by recovery tools,
so I'll advice you to copy the wallet file and use another machine or at least another system drive to work on its recovery.