My friend and I are attempting to play the Campaign Co-Op, and we continuously encounter the issue where once we get into the lobby for the Campaign, and attempt to start the mission itself, we get an error stating that there's a problem with the connection, and after awhile, it just says connection failed. Niether of us have firewall restrictions, and we're both on the same internet, so I don't really know what else to try to fix it.
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