Get Server Busy Message Even After Deleting All Traces Of MP3Tag Per The Suggestions I Have Found

I have used MP3Tag again for several months after not having used it for about a year. During use a week ago I got the "Server Busy" message and nothing I did allowed me to use it again. I have uninstalled it and check for remaining fragments in Task Manager and the Registers but when I install it again I get the same message. Since there are no recent discussions, the problem must be unique to my system which is Windows 10. I have installed MP3Tag on another computer Windows computer running Windows 11 and it works but I would like to get it installed again and working on my Windows 10 computer.

So: what is the difference between the 2 system (besides the OS version)?
I would check network and access rights esp. ownership.
Does it happen to all files or only special ones?
Where is MP3tag stored? Is it a standard or a portable installation?
After which step of your workflow do you get the message?