The app references non-public symbols in : UIFontFeatureSelectorIdentifierKey_ForNewSwiftAPI, UIFontFeatureTypeIdentifierKey_ForNewSwiftAPI. If method names in your source code match the private Apple APIs listed above, altering your method names will help prevent this app from being flagged in future submissions. In addition, note that one or more of the above APIs may be located in a static library that was included with your app.
We got this error mail from the build-1 of the version 3.2 and we tried few more times till build number-5.
We have upload same as version 3.1.