My friend is first sergeant and i am second lieutenant, however I have people on my friends list that are very close to my rank and they dont show up either. none of my friends do

Just returned to the game a couple days ago. Trying to play with a friend, but when I click on group, no names to invite pop up. Its just a blank screen, and wont give me any people to invite. Its basically just empty except for the search bar, invite players button (which is greyed out), back button, and show friends/all dropdown. Really want to play with my friend in MM battles so would really appreciate a fix.