Activation Manager not loading (mac)

Has anyone got this working on Mac OS 13? Just bought an upgrade to Cubase 14 and the window doesn’t open. I’ve tried the workaround they posted here:

However I don’t see the button that they state should be there (just a dead page pretty much)… Any pointers would be welcome (I’ve emailed support but don’t suspect I’ll hear back soon with holidays etc.). Thanks!