A failed to login error

I just bought Minecraft from the play store and I tried signing in to my Microsoft account and a failed to log in error popped out

 How it happened: It was fine for the first time and when I exited out of Minecraft and entered the game again I was logged out of my account and when I try signing back in an error message popped out and I don't know what to do

 This is the first version that ever happened.  

See the picture below