Take a look at the order of arguments in your
#this function will get the random values def rollDice(winnerName, playerOne, playerTwo): .... ....
It is expecting
winnerName as the first argument. In your
main function you have it set as the last argument.
winnerName = rollDice(playerOne, playerTwo, winnerName)
winnerName = rollDice(winnerName, playerOne, playerTwo)
Hope this helps.