Upload app on Apple store Problem

This was quiet of a hit and trial method. I had been struggling with the same issue when I uploaded my first app to App store. It was the same message about UIWebView.

There is a possibility to do a check on the IPA to find the exact plugin which causes the problem.

You need to export the IPA from Xcode and then, you need to get inside that IPA through terminal (you can get into the IPA by specifying the folder path).

Then, you shall use grep command to find references for UIWebView and it will give you the plugin that is using the reference of UIWebView.

Hope that helps !