I've tried signing up for the public beta but after signing in with my Apple ID, I am redirected back to the welcome page (the top menu now has a 'Sign Out' option). I have tried on different devices, disabling content blockers, 'Request mobile site', I'm not using a VPN etc. I have installed public betas previously and have unenrolled afterward. Now I can't seem to enrol. Anyone else? Any ideas?