I'm having this issue and while signing the new agreements temporarily fixed it, I still have this issue quite often.
It works roughly 50% of the time.
Sometimes restarting Xcode once fixes it, other times (like right now) nothing seems to fix it... And then eventually it ends up working. This time around I actually managed to upload it but there was a bug with the notarization, and I can't seem to upload it a second time.
Topic:
Developer Tools & Services
SubTopic:
Xcode
Tags: