Good news, if you delete the minecraft dungeons entry from the registry it'll let you log back in and seems to be working for me.
Disclaimer: Messing with your windows registry could cause system issues.
Removing the key at "HKEY_CURRENT_USER > Software > Mojang > Minecraft Dungeons Launcher" will removed the cached credentials. So you'll have to login again but all your game state seems to be saved somewhere else.
Note that I also uninstalled the launcher before trying this, although I suspect it doesn't matter.
Good news, if you delete the minecraft dungeons entry from the registry it'll let you log back in and seems to be working for me.
Disclaimer: Messing with your windows registry could cause system issues.
Removing the key at "HKEY_CURRENT_USER > Software > Mojang > Minecraft Dungeons Launcher" will removed the cached credentials. So you'll have to login again but all your game state seems to be saved somewhere else.
Note that I also uninstalled the launcher before trying this, although I suspect it doesn't matter.