Cant log in to my Microsoft account on switch which makes it unable to play with others online

Since the beginning Im struggling with problems on my Switch version of the Game.
I wanted to play with friends, so i bought, not only the Minecraft Version, but also Nintendo Online. I had to log into my Microsoft account, which was needed to play online, but before that i had to log into my nintendo account too. After that was done, i couldnt log into the Microsoft Account! There's also an error message which says: "We tried to connect you to your Microsoft account, but something went wrong." All of this makes it inpossible for me to play Online.

Please help me.