That's weird. What platform are you on?
I found how to fix and why, because when we start the game we have $0 and when we die at the first match we lose our inventory and IDK why, but we also loose cash and then our money is negative, and we can't start the game, so I found a temporary solution is to delete the save file and is like a restart solution but is not fix. So I hope that will be fixed at a further update.