Did you see any sync errors?
No syncronization at all - but only at Nimbus app for Windows PC.
No error report, just rotating sign of syncronization.
Nimbus site for WEB works OK.
Android apps are working without problems at smartphone (Huawei P10) and tab (Huawei).
With my previous smart (Nokis Lumia, Mobile Windows) there were no problems of syncronization.
Hmm, what did you see in the status bar - http://nimb.ws/9yBjhv ?
Nothing, as far as I can remember. App for Win is already deleted - can not take a glance now.
Customer support service by UserEcho