Not that this is a solution, but if your friend sends you an invite, can you press Alt + Tab to get to the origin window and accept the invite?
Yeah, we tried that, but it ended up with an eternal loading screen for me. I don't know if it's unrelated to my first issue or not. The main thing I wish to get out of this is to play multiplayer with my friends.
Also tried repairing the game and reinstalling it a few times, just for good measure.
I think eternal loading screen is an unrelated problem. There used to be a couple people that I could never connect with and vis versa, I think it is either a router or ISP thing. Although there seems to be some problem with the map Condor where people get infinite load more commonly than you would expect.
