Unable to render Card preview - WARN: Not whitelisted



My website: http://ahansabharwal.com/ is working correctly but http://ahansabharwal.com/55ec5ed23e7c8.html is not.

This the HTML:

<html><head></head><body><meta name=&quot;twitter:card&quot; content=&quot;summary_large_image&quot;><meta name=&quot;twitter:site&quot; content=&quot;@nytimes&quot;><meta name=&quot;twitter:creator&quot; content=&quot;@SarahMaslinNir&quot;><meta name=&quot;twitter:title&quot; content=&quotParade of Fans for Houston’s Funeral&quot;><meta name=&quot;twitter:description&quot; content=&quot;NEWARK - The guest list and parade of limousines with celebrities emerging from them seemed more suited to a red carpet event in Hollywood or New York than than a gritty stretch of Sussex Avenue near the former site of the James M. Baxter Terrace public housing project here.&quot;><meta name=&quot;twitter:image&quot; content=&quot;http://graphics8.nytimes.com/images/2012/02/19/us/19whitney-span/19whitney-span-articleLarge.jpg&quot;></body></html>;

I need the &quot or any other methods of escaping the double quote like " or ’ (single quotes). So I have the same code on both the pages. The main page (http://ahansabharwal.com/) works perfectly fine. But the http://ahansabharwal.com/55ec5ed23e7c8.html page gives the error:

INFO: Page fetched successfully
INFO: 8 metatags were found
WARN: Not whitelisted

If the problem is the escaping (which happens when I do both &quot and " ), then could you please tell me a way to escape the double quotes which the validator will accept. Or if there’s something else wrong. It’s worth saying, that both the http://ahansabharwal.com/ & http://ahansabharwal.com/55ec5ed23e7c8.html pages have the same code accept the &quot.