It's not the game's fault you're getting this. It's your fault. If you'd bother to use the search function, you'd probably find the answer. But you, like every new person who starts this game, will probably be too lazy to search for it and want an answer anyways.
Disable your firewall/antivirus and then try playing.
Team Ashe ft. Terrabyte, the Hobo Ashe
I'm friendly until you upset me. So don't. ;w;