i try to access multiplayer and it goes back to the mc launcher and says it has crashed

i am using the newest version of the minecraft launcher and 1.8.7
when i try to access multiplayer it crashes saying there has been a problem, this is only on multiplayer, i have tried single player and it has wroked fine, it is not internet connection i think since i have good connection and that it doesent say that i am not online but that i have crashed, i have also restart my mincraft launcher and computer