Have you actually gone in through Apps and force stopped it? I've found that sometimes after I do that it picks up again.I went in task switcher and closed it out several times. No good. I ran out of ideas and options.
Yeah, it doesn't work for me if I just do task switcher. You have to actually go into Apps the long way and use the Force Stop button.
I just tried it. Still the same. "server not found" yada yada yada.
I'm using a Galaxy S21, Galaxy 9+, Galaxy S7, a Galaxy Tab S 8.4, Poweramp, and Musicbee.