Marketplace won't open, Realms and Servers won't load on Nintendo Switch

When loading into the main menu, after logging into my Microsoft account I get one of two messages saying either "There is an error with your account. You will be unable to use the marketplace until we have resolved the issue. If the issue persists for several days please contact support" or "Invalid session (try restarting your game)". After waiting several days and restarting my game a few hundred times nothing seems to change. With me being unable to access the marketplace, I can't access skins, worlds, or realms. The base game still works fine though. Servers are very slow to load for some odd reason, even though I have a strong internet connection.