Looking for help with bootstrap thumbnails on my portfolio page

So I’ve been working on my portfolio page and I’m having an issue. I want to actually use this page in the future, and I’ve thrown it up on my domain “austinlake.net”. For some reason, the thumbnail class doesn’t seem to be functioning (using for web portfolio previews), but on my CodePen they look fine. I figure it must have something to do with my includes, just not really sure here.

Imgur does not allow hot-linking from a website per their terms of service, so the 2nd and 3rd thumbnail may not show properly.

Here is what I see when viewing on Codepen or your domain. What are you expecting to see that you are not seeing?

The imgur policy explains my original issue. It’s working now as I ended up forcing the size of the parent and making the images responsive. Thanks for the help!