I created the backup on one OnlyKey, now I want to restore it to a second OnlyKey to create a backup of my first key.
However, when I restore the backup to the second OnlyKey, I’m getting the following error:
Could not parse backup file. InvalidCharacterError: Failed to execute 'atob' on 'Window': The string to be decoded is not correctly encoded.
I opened the backup file in a text editor, and it looks ok (no strange characters).
I am also unable to restore this backup to the very same key that I created the backup from.
I am on Windows 10 with the latest version of the OnlyKey App (v5.3.0) and the OnlyKey firmware (v2.1.0-prodc).
What am I doing wrong here?