I, too, have had this error for many months. Very annoying. I have five accounts on my PC. One adult tied to MS, one local account, and three accounts for my kids. I tried several fixes, like making my account local again, rebooting, re-activating the MS account, but nothing has worked. Pretty bad MS still haven't fixed this (oh, and I'm on windowws 10 1809 and am stuck with the bugs in that, too, at the moment!)
cheers
DrWig