@all: This problem occurs regularly! No panic.
Sure, it’s sad that the firmware still have those bugs, but it is at is is.
In my case with a dozen cams this appears like every month once or twice. Annoying.
If a camera goes offline without any reason and without you turning it off before, just wait till its back online sometime later (if you got time).
Else: Don’t follow the instruction from @AnkerSupport as it is not necessary to remove and re-add the cam and needs more work and wasting more time than doing this:
- Unplug the Homebase till the sound appears: “Homebase is now opperating on backup battery”
- Press the little round button at the backside of the homebase short and once.
- The Homebase is now OFFLINE and turned off.
- Wait some seconds and plug in the power again.
Thats it. After the homebase restarted all cams are available and online again!
(…without the need to remove the cam(s) from the homebase and laboriously re-adding them)