MarketplaceService:PromptProductPurchase() error: attemp to perform arithmetic(sub) on number and nil

Bug Reports Engine Bugs
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#1

bug
bug993×436 365 KB

  1. click purchase product/gamepss in game, and then cancel
    repeat 1 many times, client log print this picture bug.
    and then i can’t purchase anything in game, i must leave game and enter again.

we enter many other games ,repeat step1, show the same question.
we test this problem in studio, but never print this bug.
anyone know how to solve it?

#2

maybe in game purchase, it’s caused by checking player robux is sufficient to purchase this item?

#3

Duplicate: