Ccleaner Pro Trial installation (and Driver Updater before this) cannot connect

Would like to try Pro but it won't install, saying connection required. I've disabled all Anti virus/malware/firewall, everything else is finding internet, not Ccleaner. Cannot find this issue when searching, error code from Driver Updater not found online either.

I'll make a note to the staff to check the licence server is working OK.

Heya @Head Dude please send our team an email at support@ccleaner.com so we could look more into your current situation.