I am running on the UCCX 11.6 DevNet Sandbox, but whenever I want to log in via the browser, I get certificate errors. I try to install the certificate, but that doesn't help
Edit: also, Jabber reports that "Your phone account has not been configured properly"
Edit2: Tried to reserve a 12.0 or 12.5 environment (would be nice to test with both), but was told "concurrent sandbox limit reached" - not sure if it is because they are in use by others, or if it is because I can only reserve space at one at a time?