The developers of Suicide Squad: Kill the Justice League had to shut down the game's servers almost immediately after it appeared in Early Access.
The reason was a bug that prevented players from completing the story campaign. They had it completed immediately after entering the game, so gamers could not even familiarize themselves with the story. As a result, Rocksteady studio was forced to shut down the servers of the novelty almost as soon as it became available.
In the future the authors promise to add offline mode to Suicide Squad: Kill the Justice League, but for now you can play the game only with an active Internet connection.