eagerly awaiting Xcode beta 7 at this point... I'd really like to keep working on my app.

did you ever find a solution to this problem? I am experiencing the same.

having the same issue and there is another post stating the same. I think its a bug and we will have to wait for GM to hopefully resolve

issue still present in GM sadly

Try the app store

confirming using username and password instead of a passkey is working for me