The dreaded unsigned 32-bit integer bug strikes again.
That article says her alleged win was $42,949,672.76. That is 4,294,967,276 pennies.
2^32 = 4,294,967,296. That is 20 more than what she won.
What likely happened is she had a balance a little over zero. Then something strange happened and somehow her balance should have been -20. Maybe she made a bet more than her balance somehow.
A common way to store a number on a computer, which is never supposed to go negative, is with an unsigned integer. These integer commonly have a maximum size of 32 bits, or 4,294,967,296. What happens if you try to store a negative number in them is they wrap around. 0-1 = 4,294,967,295.
What will likely happen, if she is smart, is she will get an attorney to argue the machine didn't "malfunction" but did exactly what the programmers told it to do. It will get settled out of court for something more than a steak dinner. Around a million would be my guess.
It's not whether you win or lose; it's whether or not you had a good bet.