Game iOS Rejection issue

Hello,

My app got rejected and I got this message:

We discovered one or more bugs in your app when reviewed on iPad running iOS 8.1.3 and iPhone running iOS 8.1.3 on both Wi-Fi and cellular networks.Specifically, we noticed that your app does not display properly. A screenshot is attached for your reference. (I attached the reference)

This is a very weird thing that never really happened to me and I don't even know how to debug it, or what the problem might be.

I am using NGUI version 3.7.3 and unity version 4.3.4. All android versions are working properly except for that they have said.
I was just wondering if anyone faced such a problem.
Would anyone be able to help me? Guide me?

Thank you