I've problems with redeem purchase after iap.
Error: Error Unity Failed to redeem purchase: GetInAppPurchasesFailure: Failed to get purchases from GooglePlay; Error Unity Reason:Error deserializing JSON credential data.
I found a person on the forum with the same problem: https://community.playfab.com/questions/79700/error-when-using-redeemgoogleplayinventoryitems.html, but I have all the data filled in correctly. (such as the key to the service account, etc.)