Cannot open songs!! – GuitarTapp PRO - Tabs & Chords Review

Works perfectly on my Samsung Galaxy S8, but when I try to open a song on my iPad I get an error message saying "'Undefined' is not an object", whatever that means. In other words, the app is non-usable. I certainly don't want to have to use my phone on stage!
Review by Sunday rocker on GuitarTapp PRO - Tabs & Chords.