Hey mate,
Try all of these:
Restart your computer.
Check that your Java version is up to date.
Delete your cache and try again to launch the game.
Try all of the repair options
You can also look here:
+1 Seem like a really nice guy and you are very active!
Also...
My birthday is the 5th of January
I'm from the UK
I'm 23
Computer Science Degree
Are we twins?
(Cyan on Discord, wos in-game)