The way I fixed it was going online to Minecraft and Microsoft and resetting my password. That fixed it for us.
I opened another error report in this topic since this one is resolved. I also clicked on the link above and filed an error there. https://help.minecraft.net/hc/en-us/requests/new
Maybe you all can do the same?
The way I fixed it was going online to Minecraft and Microsoft and resetting my password. That fixed it for us.