Crashing upon Opening.

[OfficialTinted]

Ok, so I downloaded MultiMC to use for Direwolf20 and when I open it, it load up and then it says 'Mojang' then it just closes and this is what the log says.

http://i.gyazo.com/2540f7e49ae9f6dec035629b2cf460f2.png

It doesn't give anything away on how I can fix it, please help.

Thankyou, Tinted.