During the Liberty Island mission one teammate left.
The game failed in the first way because it was impossible to kick that member from the team despite them being disconnected. The game simultaneously failed in a second way because once the team dropped to three members, it was impossible to invite a replacement. After clicking "Find More Agents" the game failed to do so, and instead took me to the screen where I had to choose the purpose for which I was inviting other players for, instead of identifying the fact that the team was already halfway through the Liberty Island mission. The only choice it offered was to invite people to The Summit!!!
Even then, when I chose the Summit, invite functionality failed altogether.
I passed on team leadership to another player and he was unable to invite also. We had to wait howver long it is for someone to be automatically kicked from the group for inaction, and only then could we invite other players and complete the mission.
No, I'm not recording a video for you, editing it, and then annotating it. Troubleshooting is YOUR job, not mine.