Team Up, Throw Down - Bugged

Been stuck on this mission for about a week now. Below is a list of all the things I tried, none worked. I've tried all of these and my progress is still at 0/3. My brothers is also glitched. We both play on PC normally. Its extra annoying bc you have to sit there and wait for people to join and no one wants to do throw downs. And you cant challenges while you wait. Then you finally get people to join (usually 1 lol) and it doesnt even progress the mission. This is also the only mission I currently have.

-signing out and signing back in

-restarting the game

-turning off crossplay

-uninstalling and reinstalling the game

-playing on xbox (normally playing on pc)

-using default throwdown settings (3 min, 4 Players)

-using custom throwdown settings (1 min, 2 Players)

-winning the throwdown

-losing the throwdown

-hosting the throwdown

-joining someone elses throwdown