I have installed a new instance of discourse following the official discourse installation guide. When I create a post and upload a large image (say 1500x1200px) a thumbnail is created for the post, but when I hover over the image I get no option to click on it and view the full size image.
I am using v2.1.0.beta3 +64. I have the option “Create thumbnails and lightbox images that are too large to fit in a post.” enabled in settings.
I do have another instance of discourse used on a different domain (using version 2.1.0.beta3 +56) and the image preview works as expected. As far as I can tell, the settings between the two sites are identical.
The site that works is using Ubuntu 16.04 LTS, the site that is giving me issues is using Ubuntu 18.04 LTS, would this be part of the problem ?
Im not sure how to troubleshoot this problem, any advice welcome.