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Certain Images with post not appearing when hosted on https

I am creating a post with an image link in it. The images are hosted over https. It works for some servers and not for others.

This works and the image appears correctly with the Post: https://imageserver.rewardstep.com/imageproxyserver/imgs/WmJy1RGKdmPuuUCBlafI9GvPHRuppV2u1ss9dtLoceH5ZrGKBVjNsxwkZutvj0CW.jpg

This does not. I just get a blank square in place of the image in the post: https://www.thankyou.com/images/rewards/thumbnail/1112789.jpg

Do you know why this might be happening? Someone told me it is because of the difference in the certs on the two servers - one of them is using EV Cert which might be causing the issue.

Solution

  • This issue was resolved. The problem was a faulty intermediate cert in the chain.