Same issue here. I received a welcome email and went to my account. Shows the pledge I made but there is no key to be found. Maybe all the keys are still coming out?
did you try copy pasta-ing the link to the address bar? the link specifically ends with "/account/mykeys," so you might have gone to the wrong webpage. Maybe. If you did go to that webpage, I don't know then.
also goes with the email : Step 2: Download and Login to the Launcher Download the launcher from https://store.uberent.com/download/pasetup.exe