lhelmeg

Yes, I solved it:
When the alarm light blinks and the printer won't do anything not even scan, you can press the reset button (on the printer) for 10 seconds and then, while holding the restet button down, you simultaneously press the OK button (on the printer) for a few more seconds. For some reason, I sometimes need to do it several times before the alarm light goes off but so far, it always unblocked the printer in the end.
At that point, do the "Enable Status Monitor" as explained by beauxart above.
Laure