Titan Fall 2 Trial Multiplayer not working on free multiplayer weekend

Hey,

I'm new to online forums and I'm not completely sure if I posted this in the right thread or conversation. I have had the Titanfall 2 trial for quite a long time and I heard that this weekend the multiplayer would be accessible to those with the trial. However, when I turn on the game the multiplayer option is not available and it prompts me to buy the game instead. I am quite disappointed because it has only worked once today and that was after my friend invited me to a game. Now, it keeps disbanding the party even after he invites me. I've tried uninstalling and reinstalling the trial and clearing the saved data but it doesn't seem to work.