Related thread: PromptGamePassPurchase Error
Seeing as I was able to reproduce the error specified in the above post in both Roblox Studio and a live game, I have decided to take this to the Engine Bugs category.
Issue: It seems that the CorePackage PurchasePromptImpl is experiencing an error, “unable to cast double to token”. If a user accepts a game pass purchase after PromptGamePassPurchase is used, this error will be spat out to the console. This also prevents other purchase dialogues from appearing.
Developer Console in a live game:
Aside from other purchase dialogues, I am unsure if anything else is affected by this error. My concern is that other CorePackages are also throwing errors as a result of this.