I was logged out of my account in Minecraft but clicking on Log In does nothing and I can't log in or play with my son anymore. After about a minute, this window pops up:

I deleted and reinstalled the Minecraft Launcher and Minecraft Bedrock Edition, but that did not fix anything. In fact, it seems to have made things worse because the launcher now claims that I'm logged into different accounts in the Microsoft Store and in the Launcher, but I'm absolutely logged into the same account.