DS923- Error OSStatus Error 80

I have been attempting to reconnect my NAS to Time Machine:

I can enter the first step when it asks for the account name and password.

Afterward, my Mac asks for the encryption key- once I add it, it gives me the error message " Error OSStatus Error 80," and I can’t sign in.

I tried searching for what Error 80 is, but I had no success.
I can access my backups in my Synology.
I checked Keychain access and don’t know exactly what I’m looking for.

What would be the next step here?

Troubleshooting Methods:

  1. How to access files on Synology NAS within the local network (NFS) - Synology Knowledge Center

  2. Went to KeyChain Access on Mac:

  • Updated the misspelling of the Time Machine Folder

Somehow, this worked - not sure how.