Blocking API Issue

Hello,

I working on the app that wants to use Blocking as described here: https://developer.oculus.com/documentation/unreal/ps-blockingsdk/
We had Data Use Checkup approved for blocking.

Currently when querying blocked users with 

ovr_User_GetBlockedUsers()

The response is received with no errors, but it returns no blocked users even though the account has blocked users. 

auto UserArray = ovr_Message_GetBlockedUserArray(Message);
auto UserNum = ovr_BlockedUserArray_GetSize(UserArray);

As well as when attempting to start

ovr_User_LaunchBlockFlow(UserIdToBlock)

 On oculus device we get a following pop up message: 

I have tried using the blocking API with Test Users as well and experience the same issues.

Does anyone know if blocking api works for unpublished apps?