Here are a few scenarios that might prevent you from pairing.
1. You would need to verify that you have a dev build with Taplytics' SDK installed into it. If you have an app that doesn't have the Taplytics' SDK installed, you won't be able to pair your device with Taplytics.
2. If you're using a production build from TestFlight, Fabric, Hockey App, or the App Store/Google Play, and this is on a device that has never been paired before, you won't be able to pair it. You'll need to get a dev build.
Here's a situation where you would be able to pair with a production build.
However, that's not to say you can't pair with a production build - you can, but only if you've paired previously on the same device with a dev build at some point.