Twitter:card : summary_large_image, Image is not shown up


Whenever I share post via twitter share button the preview image does not show up (twitter card image).
Please check below code to show twitter card for
meta name=“twitter:card” content="summary_large_image"
meta name=“twitter:site” content=""
meta name=“twitter:creator” content="Quick Heal Technologies Ltd."
meta name=“twitter:title” content="The Top 10 Cybersecurity Stories of 2016"
meta name=“twitter:description” content="Before we take yet another step …"
meta name=“twitter:image” content=“

Here image is 150x150px (5kb only), I have checked with medium image also (250x150) .

Below is code to allow images for Twitterbot in robot.txt:
User-agent: Twitterbot

Still image is not showing on twitter card. Below is the screenshot;

Kindly do the needful.
Our posts are not getting shared because image is not shown up.


You’ve selected a Summary Large Image card.

Images for this Card should be at least 280px in width, and at least 150px in height


Sorry for the late replay.

Issue has been resolved after using given dimension image.

Thanks, thanks a lot.