App Glitch Check

I am looking for a developer to check an app thats been developed but has glitches. So this task/project is to check a build. Install it on your iPhone and check through. As the build I have no longer has a working splash screen, the Hamburger Menu should work and open a side menu, but it doesn't. The Apps Search Icon Button should open the search screen. Again, it doesn't. The issue is, this App works fine on my developers phone. But the Diawi Link and the TestFlight downloads do not work for me here in the UK.

The Project Requires:

Excellent Knowledge of Xcode
Problem Solving
Expert in Coding for Apple iOS
Good command of English.
Ability to check PHP Backend Code to Xcode App Code.

This is a through project. Quality Control.