com.gargoylesoftware.htmlunit.ScriptException: TypeError: Cannot call method "appendChild" of null (js#31)

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    • com.gargoylesoftware.htmlunit.ScriptException: TypeError: Cannot call method "appendChild" of null (js#31) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$HtmlUnitContextAction.run(JavaScriptEngine.java:548) at org.mozilla.javascript.Context.call(Context.java:577) at org.mozilla.javascript.Context.call(Context.java:499) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute(JavaScriptEngine.java:430)

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