MC DONT WORK

Hello Mojang/Minecraft since today i have this error if i join an server 

my mc freezes and get white loading screen or something 
and if im close it i get this error 
https://gyazo.com/0f43c3eeba7f76161c9df7a29f9ebb0b
https://gyazo.com/b730920b87bbbb171cf68d4c27d25231