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java.lang.NullPointerException: 	at com.gargoylesoftware.htmlunit.javascript.SimpleScriptable.getPrototype(SimpleScriptable.java:247)	at com.gargoylesoftware.htmlunit.javascript.SimpleScriptable.makeScriptableFor(SimpleScriptable.java:217)	at com.gargoylesoftware.htmlunit.html.DomNode.getScriptObject(DomNode.java:790)	at com.gargoylesoftware.htmlunit.html.HtmlScript.setAndExecuteReadyState(HtmlScript.java:457)	at com.gargoylesoftware.htmlunit.html.HtmlScript$1.execute(HtmlScript.java:212)	at com.gargoylesoftware.htmlunit.html.HtmlScript.onAllChildrenAddedToPage(HtmlScript.java:238)	at com.gargoylesoftware.htmlunit.html.HTMLParser$HtmlUnitDOMBuilder.endElement(HTMLParser.java:699)	at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source)	at com.gargoylesoftware.htmlunit.html.HTMLParser$HtmlUnitDOMBuilder.endElement(HTMLParser.java:657)	at org.cyberneko.html.HTMLTagBalancer.callEndElement(HTMLTagBalancer.java:1170)	at org.cyberneko.html.HTMLTagBalancer.endElement(HTMLTagBalancer.java:1072)	at org.cyberneko.html.filters.DefaultFilter.endElement(DefaultFilter.java:206)	at org.cyberneko.html.filters.NamespaceBinder.endElement(NamespaceBinder.java:330)	at org.cyberneko.html.HTMLScanner$ContentScanner.scanEndElement(HTMLScanner.java:3116)	at org.cyberneko.html.HTMLScanner$ContentScanner.scan(HTMLScanner.java:2083)	at org.cyberneko.html.HTMLScanner.scanDocument(HTMLScanner.java:918)	at org.cyberneko.html.HTMLConfiguration.parse(HTMLConfiguration.java:499)	at org.cyberneko.html.HTMLConfiguration.parse(HTMLConfiguration.java:452)	at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)	at com.gargoylesoftware.htmlunit.html.HTMLParser$HtmlUnitDOMBuilder.parse(HTMLParser.java:901)	at com.gargoylesoftware.htmlunit.html.HTMLParser.parse(HTMLParser.java:350)	at com.gargoylesoftware.htmlunit.html.HTMLParser.parseHtml(HTMLParser.java:304)	at com.gargoylesoftware.htmlunit.DefaultPageCreator.createHtmlPage(DefaultPageCreator.java:134)	at com.gargoylesoftware.htmlunit.DefaultPageCreator.createPage(DefaultPageCreator.java:101)	at com.gargoylesoftware.htmlunit.WebClient.loadWebResponseInto(WebClient.java:449)	at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:332)	at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:389)	at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:374)	at myClient.main(myClient.java:8)