App suddenly stopped working on my MacOS
I have a MacbookPro 2010 with MacOs High Sierra - Version 10.13.6
I have been using my App called; Logoist2 for several years now with no issues.
Suddenly this morning I tried to open the App, and it suddenly asks me to Sign-In with my AppleID to use the App on my same computer.
Its specifically asking for the AppleID and Password used to purchase it. Of course my AppleID has never changed, but I don't remember what password I purchased it over 10 years ago.
When I enter in my current password, it responds with the following:
"An unexpected error occurred while signing in. The data couldn't be read because it isn't in the correct format"
I am frankly flabbergasted and have no idea what is going on. Can anyone help please?
MacBook Pro 13″, macOS 10.13