Bug in the Launcher

When I Login into the launcher and I click play,everything is normal but in the Multiplayer section, all the server have "can't connect to the server" as MOTD and when I try to play in singleplayer, the game crash. It says:
"The game crashed whilst updating screen events
Error: java.lang.IllegalStateException: failed to create a child event loop". This problem persist for 3 days. I sent the reports of two days ago in "attachment"