I can provide any further info needed but I don’t know where to go with this and all my motion sensors etc are now redundant. Help
Did you update to zigbee2MQTT version 2.0.2 without reading the release notes?
There are a few changes you have to make.
See: Zigbee2MQTT 2.0.0 breaking changes · Koenkk/zigbee2mqtt · Discussion #24198 · GitHub
And a summary here: Zigbee2MQtt not working after update to 2.0.0 - #8 by tom_l
I didn’t see any update for it but from looking at the addon it appears to be set to update automatically. I’ll have a look this evening and report back.
That’s what has happened then. Best to turn that auto update off for all add-ons or you can get bit by breaking changes like this.
Thankfully there was an update which addressed a bug with rpi4 devices which appeared to be my problem