How to fix elements not showing on the front-end?
In this article
The "Mixed Content" problem
Check for the "Mixed Content" problem.
One reason for this issue could be the so-called “Mixed Content” problem and the simple solution to that is to use one of many “Force SSL” plugins for WordPress.
We recommend using “Really Simple SSL” which may resolve the situation in a few clicks.
What is a Mixed Content error?

How to tell if your page has a mixed content problem?

Problems caused by optimization plugins
Cache
Try clearing the cache
One simple solution is to clear or purge the cache. This normally resolves the problem.
Almost all WordPress cache plugins work the same when it comes to caching. They store a version of a pre-generated page in the file system or memory and serve it to users until it expires.
This process can cause unexpected problems for complex plugins like Depicter and unfortunatly this is nothing straightforward and each plugin and option needs to be investigated to see if it's the source of the problem.
Minify and Combine CSS/JS files
Turn off or exclude Depicter files
Turn off the minification and combining files or at least exclude the Depicter files.
Minifying files is another feature of optimization plugins but you don't need it for the Depciter. The depicter style and script files are already minified.
Combining files is another advanced optimization process but it normally causes further problems.
CDN
Using CDN for delivering images can cause display problems because the URLs of the images are different.
lazyLoad
Lazyloading is an integrated feature of the Depicter and having another plugin applying lazyloading effects on the images of the website can cause function conflict.
For lazyloading and CDN options the best thing to do is to turn these options ON and OFF and after making sure that these are the source of the problem, contact our support for further investigations.