Vbucks Transaction Failure.

Hey! So, I heard about epics new update for UEFN. You can sell items in there (such as weapons and/or consumables). And I’ve watched a few videos on it, I enrolled in Epic’s Creator Portal, and I coded and set the transaction device up. And it shows no errors is VS Code. I hooked up the item granters and everything else to it. I put what Items I want to have in the marketplace in there. And finally, I launch the game, I go to the marketplace, and I click on the weapon, and I click buy. It says I bought it successfully, but it doesn’t show up in my inventory. Could anyone help me out?