I removed a module that was using WKWebview for web based help that accessed my website. No issues, there. I replaced it with a device housed help file. After doing so, I received this warning: Library 'iUI8' is not used. (warning #32). So, I removed it. After recompiling, my app crashed where it never had before. I checked what this library is used for and found that it is needed with WKWebviews. My app was crashing because I removed the library as suggested. Then it dawned on me that the crash occurred accessing a module that was using a WKWebview. I reinstated the use of the library and all is well. Sooooo, long story, short: why the warning, when the library is actually being used?