Something changed, extractor has failed!

[begiflow]

I got an error for the first time I called extractorUrl()
It always return exception with this line of code
JSONObject ytPlayerResponse = new JSONObject(mat.group(1));
But when I try it again then it works as It should be.
After take a look deeply into html response.
I see some different between the first and second time json.
Seems youtube has change something.
Does anyone else got this error ?

[begiflow]

More detail:
After checked the pageHtml.
it's contains privateDoNotAccessOrElseSafeScriptWrappedValue tag.
throws exception when extractor try to get json string.