Why am I getting UT005023: Exception handling request to ... : java.lang.NoSuchMethodError: ...Lorg/apache/wicket/Application;

Question

I am upgrading a project from Java 8, WildFly 8, Wicket 6 to Java 10, WildFly 12, Wicket 7.10. The issue is that when I request a page, I'm getting a NoSuchMethodError exception any time my WebApp which extends WebApplication which extends Application calls a method defined in Application.

For example:

getRequestCycleSettings()
getMarkupSettings()
getJavaScriptLibrarySettings()

etc...

Any ideas on why this is happening?

Thanks