87003S:62001S:-8A Error, I'm in a party and cant join the game with my friends.

I'm in a party with my friends, when they entered a game, i can't. I still wait in lobby. They play without me. It started 2 days ago, i donno whats the problem! After they join the game, i click one of my friend and clickt "join game" and then this error code appairs 87003S:62001S:-8A. 

Whats the problem? How to fix it?