Thanks for responding Naomi. I’ve double checked and the email address is definitely correct.
I’ve just changed the Licence Test Response from “respond_normally” to “licensed” to see if that would help. Unfortunately the “purchased” event doesn’t seem to be happening any more (someone has already reported the bug in another topic).
However even if I use the " android.test.item_unavailable" product ID I still get the “invalidClient” response.
I’ve no idea how to get around this.
I don’t know if this could be contributing to the problem:
The dev account belongs to my boss, I’m just added on as an admin user.
I only have the one Android device to hand, which is my own phone. I don’t want to factory reset the phone, and it already has my own gmail account as it’s main account.
Could the fact that I’m not the dev account owner be causing the problem? I don’t see why it would make a difference, since you can add test users, and I have already added my own email address to that test user list. Just thought it might be worth mentioning.