Steps:

• I start the launcher
• realize it's a new version
• enter username and password
• check "keep me logged in"
• hit login

Outcome:

• I'm logged in
• It tells me "Oh no! Something went wrong and you will not be logged in automatically next session."

I ignored it for a few days, but the error still exists.

And to mock me further, clicking on the "View our troubleshooting guide" link leads to a 404 page. (https://help.minecraft.net/hc/de/articles/4408668374925)