Images Don't Display on Landing Page

So I created an RTP and landing page that was sent out through an email. I am getting feedback from a couple people that the images on the landing page display like below.

I'm not sure what the issues is as I am able to see the images just fine when I click the link in the email then RTP message to see the landing page. Is it something I can fix on my end or is it them?

Thank you in advance!