I have been code signing my py2app Python applications for over 5 years. Recently, my application notarizes and staples with no errors. However, when I try to verify the signature I get the above error. I do not see any errors in the appropriate notary log file. Can't figure out how to post the log file. The associated ID is: eb78c6b0-cdd2-414f-9dd3-24315a27d457 Can anyone point me to an appropriate reference ?

I had been command line notarizing my two py2app (python applications) successfully now for 7 months; I use a set of canned scripts; I stored the notarization App ID in my key chain; as follows: xcrun altool --store-password-in-keychain-item \ APP_PASSWORD  \ -u <my apple id> \ -p <the app id I generated> The script uses this CLI xcrun notarytool submit Pyut.zip --keychain-profile "APP_PASSWORD" --verbose --progress --wait All of a sudden now notarization fails with: Error: HTTP status code: 401. Invalid credentials. Username or password is incorrect. Use the app-specific password generated at appleid.apple.com. Ensure that all authentication arguments are correct.