I am using envira gallery to show logos of our partners. The logos should link to the partner’s websites. However, when I look at our page, there is space where the images should be and if you hover over them, you can link to the partners, but there are no images.
Since you have installed a caching plugin WP Super Cache, please clear your plugin cache before testing your site. This can cause the changes to not take place on the front end. It will eventually show up when the cache regenerates, but it’s not ideal if you’re looking to see your changes immediately.
I also noticed that you are using Jetpack and Photon module is active. You may need to deactivate Photon module. To know the pros and cons of using Photon, please check this out: https://developer.wordpress.com/docs/photon/