ytextractor.ExtractorException: Error While getting Youtube Data:Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference

[niteshfel]

ytextractor.ExtractorException: Error While getting Youtube Data:Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference

I found this exception when extract video : example.ytextractor.YoutubeStreamExtractor.doInBackground(YoutubeStreamExtractor.java:151) example.ytextractor.YoutubeStreamExtractor.doInBackground(YoutubeStreamExtractor.java:25)

On line number 151 of class YoutubeStreamExtractor LogUtils.log(Arrays.toString(e.getStackTrace())); Ex = new ExtractorException("Error While getting Youtube Data:" + e.getMessage()); this.cancel(true);

please check this ASAP @nhCoder