App Store unexpected error : The data couldn’t be read because it isn’t in the correct format.
I'm getting the error when trying to download or update anything in the app store. Even just launching the app store for the first time it asks for a sign in even though it claims I'm signed in and I get this error.
Troubleshooting I've done:
-updated OS fully
-signed out and in of iCloud
-turning off and on computer
MacBook Pro 13”, macOS 10.14