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java.lang.ClassCastException@ 115b920e
java.lang.IllegalArgumentException: java.lang.ClassCastException@63fd8876	at sun.reflect.GeneratedMethodAccessor6.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at net.sourceforge.htmlunit.corejs.javascript.MemberBox.invoke(MemberBox.java:172)	at net.sourceforge.htmlunit.corejs.javascript.FunctionObject.call(FunctionObject.java:479)	at net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpretLoop(Interpreter.java:1701)	at net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpret(Interpreter.java:854)	at net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.call(InterpretedFunction.java:164)	at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.doTopCall(ContextFactory.java:429)	at com.gargoylesoftware.htmlunit.javascript.HtmlUnitContextFactory.doTopCall(HtmlUnitContextFactory.java:267)	at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3183)	at net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.call(InterpretedFunction.java:162)	at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$4.doRun(JavaScriptEngine.java:538)	at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$HtmlUnitContextAction.run(JavaScriptEngine.java:589)	at net.sourceforge.htmlunit.corejs.javascript.Context.call(Context.java:537)	at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.call(ContextFactory.java:538)	at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.callFunction(JavaScriptEngine.java:545)	at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.callFunction(JavaScriptEngine.java:520)	at com.gargoylesoftware.htmlunit.html.HtmlPage.executeJavaScriptFunctionIfPossible(HtmlPage.java:896)	at com.gargoylesoftware.htmlunit.javascript.host.EventListenersContainer.executeEventHandler(EventListenersContainer.java:195)	at com.gargoylesoftware.htmlunit.javascript.host.EventListenersContainer.executeBubblingListeners(EventListenersContainer.java:214)	at com.gargoylesoftware.htmlunit.javascript.host.Node.fireEvent(Node.java:735)	at com.gargoylesoftware.htmlunit.html.HtmlElement$2.run(HtmlElement.java:866)	at net.sourceforge.htmlunit.corejs.javascript.Context.call(Context.java:537)	at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.call(ContextFactory.java:538)	at com.gargoylesoftware.htmlunit.html.HtmlElement.fireEvent(HtmlElement.java:871)	at com.gargoylesoftware.htmlunit.html.HtmlPage.executeEventHandlersIfNeeded(HtmlPage.java:1162)	at com.gargoylesoftware.htmlunit.html.HtmlPage.initialize(HtmlPage.java:202)	at com.gargoylesoftware.htmlunit.WebClient.loadWebResponseInto(WebClient.java:440)	at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:311)	at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:373)	at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:358)	at Main.main(Main.java:47)