Z Matter not working

[SHM]

Just in last 2 days, all of my Z wave devices are not responding to on/off commands, etc either from the AC or UD mobile on 2 different policy's in 2 different homes.  On the AC, under the top menu I get attached message and UD mobile gives attached error.  I have not made any changes recently.  Suggestions?

[Techman]

Try removing power from the controller for a few minutes. If that doesn't resolve your issue then post a copy of your error log