tr...And my computers are still showing as offline! I've tried restarting from the tray-icon, but their status is only 'connecting...'
As CCleaner Cloud is a business edition then you have priority support and should contact them using this form:
https://support.ccleanercloud.com/hc/en-us/requests/new
That's from the help pages that are specific to CCleaner Cloud, you might want to bookmark them: https://support.ccleanercloud.com/hc/en-us
same with me. a number of my monitored machines are showing offline and displaying "connecting" in the tray icon.
As it's happening to more than one user then it sounds as if there is a server issue.
Again, the CCleaner Cloud support team would be your contact point to report the problem.
Automagically it started working again!!!
I guess that it was a server problem and the faulty server has been fixed then?