P2P Store review for BTA Appointment Booking App

I’m having a serious issue with the embedded version of Book That App. The standalone version works fine — I can create widgets, set up services, and manage settings without problems — but the embedded version doesn’t let me log in at all. Even though I’m logged into Shopify and following all setup instructions, I keep getting errors like “Store does not exist” and “1 error prohibited this user from being saved.” I’ve already tried clearing cache, switching browsers, using the .myshopify.com domain, checking permissions, and enabling the app embed in the theme, but nothing fixes it. On top of that, the app doesn’t recognize my email for login, even though it’s the same one I use to log into Shopify. This makes it impossible to use the embedded version to run my store. This is a critical issue that blocks me from using one of the app’s main features. It needs to be fixed urgently because it directly impacts my store’s operations.