This started to happen when I reached level 28 I think. Suddenly the call for backup button was greyed out, I couldn't join friends or even play with randoms, I thought nothing of it until recently when I tried to play with my friend who is a lower level but that doesn't matter because I can't even join players similar level to me. Anyways I tried logging out, changing my group status, even reinstalling the game and restarting my PC. Seems my character is bugged and I can't play MP at all almost like I've been banned or something. I am now rank 30 world tier 1 as I thought doing a couple missions would fix it or I was at a point in the game where I couldn't call for backup or matchmake but now I'm thinking this is a bug. I don't want to reset character and for this to happen on a triple A title like this is disgusting. Anyways. As you can see in the screenshots if I try to matchmake it says I need to 'Complete Activation to enable matchmaking' I hope someone here knows a fix since reddit yielded no answers. As for trying to join friends it says unable to join and unable to invite. Thanks.

Imgur image link: https://imgur.com/a/XoVxMTx