Match starts but nothing loads

On the challenge node for Florida today (Steam player), when I tried to clear the challenge node of 799 characters sentry/juggs/venom? the match starts but then doesn't load. No tiles or character portraits, mainly all black screen. I can hit escape and it asks if I want to quit but when I select yes, it won't do so. I can also access the options screen. I have tried it with different team combos, etc. I was able to play this node successfully three times yesterday and I could also clear all of the other Florida nodes a fourth time today.