No products available for purchase! Unity IAP error on android!

Unity 5.6.4f1
I am getting this error while initializing the IAP for android in unity:

I/UnityIAP: IAB helper created.
I/UnityIAP: Starting in-app billing setup.
I/UnityIAP: Billing service connected.
I/UnityIAP: invoking callback
I/UnityIAP: Checking for in-app billing 3 support.
I/UnityIAP: In-app billing version 3 supported for com.facerollgames.vr
I/UnityIAP: Subscriptions AVAILABLE.
I/UnityIAP: VR supported.
I/UnityIAP: onIabSetupFinished: 0
I/UnityIAP: Requesting 1 products
I/UnityIAP: QueryInventory: 1
I/UnityIAP: invoking callback
I/UnityIAP: Querying owned items, item type: inapp
I/UnityIAP: Package name: com.facerollgames.vr
I/UnityIAP: Calling getPurchases with continuation token: null
I/UnityIAP: Owned items response: 0
I/UnityIAP: Continuation token: null
I/UnityIAP: Querying SKU details.
I/UnityIAP: Querying owned items, item type: subs
I/UnityIAP: Package name: com.facerollgames.vr
I/UnityIAP: Calling getPurchases with continuation token: null
I/UnityIAP: Owned items response: 0
I/UnityIAP: Continuation token: null
I/UnityIAP: Querying SKU details.
I/UnityIAP: onQueryInventoryFinished: true
I/UnityIAP: Inventory refresh successful. (response: 0:OK)
W/Unity: Unavailable product com.faceroll.vr.fullgame -com.faceroll.vr.fullgame

(Filename: ./artifacts/generated/common/runtime/DebugBindings.gen.cpp Line: 51)
E/Unity: Reset MainUI

(Filename: ./artifacts/generated/common/runtime/DebugBindings.gen.cpp Line: 51)
I/Unity: No products available for purchase!

I don’t know this error derived from where and why it occurs! any idea?

Is the product available? Is that space in the product name expected? Spelling is important. Also, make sure you’ve followed the instructions here: Unity - Manual: Configuring for Google Play Store