Image does not showing up on Twitter Card



Twitter card not showing up the image. Meta tags has been added successfully and also card validator showing success:

Any help would be highly appreciated !

I have read all the instructions given in Not Whitelisted, unable to render, or no image: READ THIS FIRST

And I found all the settings fine

My Site robots.txt showing
User-agent: *
Disallow: /AppError/


but my image url is showing

is that the issue?