NINA is the most useless service ever. It never worked a single time on my phone. Not even when they send test alarms. https://www.faz.net/aktuell/politik/inland/pannen-beim-warntag-bbk-praesident-unger-droht-abloesung-16956336.html Any effort on a Nina module is currently a waste of time and resources.

@jon4s Are you running Bulls Eye? If so, then it won’t work (see https://github.com/paviro/MMM-PIR-Sensor/issues/123).
Obviousl you should stick with Buster.