Hello.

I recently started using Tapas and gently persuaded my sister to sign up using my invite code so we both can get some ink out of it (we both have iOS). However, when she writes in the invite code, a pop-up shows up which says that "An invite code has already been used on this device." which cannot be true as we're both new to Tapas and she hasn't even downloaded the app before nor did she used her email address for it before.