Marketpress Inventory not working


I'm having trouble with marketpress' inventory not functioning correctly. We're setting the product quantity in the variation but they're still allowing them to sell even when it reaches 0. I found an old thread with a patch for it which I tried but it didn't work - is there another workaround for this? The customer has already accidentally oversold one of her workshops now and is getting quite stressed by it not working so a prompt solution would be very much appreciated :slight_smile:

Thank you, Stacey