solved- "java.lang.IllegalArgumentException: input == null!"
 |  |  |
solved "java.lang.IllegalArgumentException: input == null!",
my son had a "!" in his windows userid. Having set up a new windows account he can now play minecraft with no problems. we had already tried all the delete minecraft folder and re-downloading.
WoM Coins: 2
Thank you Sooooo much ive been trying to find a fix for about a month and a half now and then i stumbled here and.... well thank you so so much you have been a great help =)