Last night updated to latest Core and MQTT_room and Sysyemmonitor stopped working. Dident spend to much time on it was spending time with wife MQTT would give me an error about the name. As for System Monitor it just stopped working. I went back to my last full backup everything is working again hope this doesn’t happen to you.
I did get the 2 alerts and hit ignore after reading about the change in name but then when I did a Yaml check it gave me the same error and wouldn’t let me do a reboot. What name are they talking about trying to figure out why its pointing to MQTT_room.