Whenever I click on the 'PLAY' button on the home page for Java Edition in the launcher, the loading bar shows and starts loading and as soon as it reaches the end, the launcher closes and then a few seconds later reopens and shows the message
"ERROR Game crashed
An unexpected issue occurred and the game has crashed. We're sorry for the inconvenience.
Exit Code: -1"
as given in the first screenshot.

Moreover, a lot of the times when I open the launcher it shows a message in the top right: "Sorry! We were unable to get your account information. Please restart your launcher." 
and in the bottom left:
"Oh no! Something went wrong, and you will not be logged in automatically next session."
as given in the second screenshot.