Minecraft on Switch: We are still working on a fix. However, for a temporary workaround, try not signing in to a Microsoft account. While you won’t have access to servers, Realms, or possibly Marketplace content, you will be able to play single player & split-screen worlds. - HZ

Could you please detail what the issue is? Can't play paid DLC now😢 I'm using a Nintendo account On title screen, I randomly get message "Signing with microsoft..." or "Signing with nintendo..." but most of the times it's just the button "Sign with microsoft" like I'm not logged