Update: The problem correlated to the quest involving the completion of your first champion mission Shadows of War or whatever it’s called. That quest had to be completed first in order for “The Final Foothold” to continue.
So I have a 120 Tauren Ret Pally (Horde) which I am trying to complete "The Final Foothold quest on. The war campaign quest tells me to do this quest. I have no problem accepting the quest from Nathanos Blightcaller, but when I try to use the war table to select my final location - Tiragarde Sound - it tells me that my quest log is full and I can’t accept it. I tried abandoning the quest and restarting it and logging out then back in, but none of this helped. I also tried abandoning some quests to make room in my log but that didn’t fix the problem either. I wanted to see if anyone else has had a similar problem and if so how was it fixed.