Great game that keeps glitching

Its a great game, but it keeps glitching. Every other time I finish trading before a fight, when I hit continue, it says "Whoops! Something went wrong." And asks me to retry. When I hit retry, it takes me back to the home page as if I didnt just finish training. Essentially, I cant complete fights most of the time.

NBohrok :3 about Smash Champs