So I got the quest for defend the castle against super mutants over radio freedom and I finally was able to defend them all but now I'm supposed to talk to Ronnie and every time I talk to her, it only lets me trade in fact sometimes even if I'm close to her and don't press anything my character will ask, to trade it's so bugged, so I can't close the quest out, I've tried going to a previous save many times and it doesn't work. Does anyone have any advice besides try a previous save? Or have any similar issues? Please help.!

Try leaving the area and coming back? The quest should eventually auto-complete, I think.

I've done that too, the only thing I haven't tried is uninstalling the game and re installing but that takes forever.

that isn't a fix for anything

Well I've done everything people have suggested but it annoys me because Preston stays there until it's complete and prevents further quests at the castle. They need to make a patch for bugs but I figured maybe someone had a similar issue and might be able to help