Hi Peke and all
UPDATE TO MY POST BELOW. ...... INSTALLING 5.1.0.2811 SEEMS TO HAVE FIXED THE PROBLEM
GREAT JOB GUYS.
Just to add to the thread. I have had the "... inaccessible or turned off" error off and on now for months. Currently running 5.0.4.2690 on Windows 11. I have mostly Google branded speakers (or genuine Google chromecast audio plugged into stereo aux plug) and one Samsung soundbar which connects to my google home via Samsung Smarthings (not sure if that is relevant). I do frequently have problems accessing the soundbar while all google speakers generally work OK.
Yesterday I could play from MM on Windows 11 to any speaker. BUT, this morning all my Google (and Chromecast) speakers get the ".....inaccessible or turned off" error and the only speaker that will play is the Samsung Soundbar. This happened about a week ago as well. From my phone (connected to the same WIFI) I can cast from YouTube music to any speaker in the house so they are all visible on the network.
A couple of other observations that might be of assistance:
1. In my speaker picklist from MM, I have an option for one called "Mobile Speaker" which hasn't been turned on for over a week.
2. My MMRemote5 (which I haven't used for a while) on mobile phone is getting the error "Can't connect to server"
3. Yesterday the "media Server" in my Pioneer Amp (which may be a DLNA?) did not appear in the speaker list (so I plugged a chromecast audio into the Aux port) to play to it.
So, in my scenario the issue is intermittent, and I can't resolve what has changed.
Hope this helps
Regards Fraser