Image not showing in summary


Dear experts,

I’ve successfully inserted the twitter summary tags in my blog. I checked the validator tool and the summary is configured correctly and working
fine even with images.

However, the Twitter summary is still not showing any image in my twitter account. For instance in you may see that the text is there as expected but there is not image at all.

But if you use the link use for that summary ( in the validator tool seems to be OK.

Could anyone help me?

Thank you so much for your assistance.