I'm getting this. No idea why, we've not changed anything in our workflow, and the relevant developer id is definitely a member of the relevant team.

The documentation (https://developer.apple.com/documentation/technotes/tn3147-migrating-to-the-latest-notarization-tool) says: "if your Apple ID only belongs to one team then you don’t need to supply a Team ID." So I tried: xcrun notarytool store-credentials "SB_NOTARIZE" --apple-id "my.nameatmycompany.com" --password "mypa-sswo-rd-xxxx" notarytool then prompted me for my Team ID: Developer Team ID: I manually typed the same developer team id into the terminal that I had been providing to notarytool via the argument: --team-id “12A34B5CD6” and suddenly notarytool was happy! Previously it failed every single time. I don't know how notarytool was not able to find my team id without me entering it manually. Hopefully this will work for other people as well, this is a very annoying bug.