FOR VERSION 3.0.9 OR EARLIER ONLY
If you experience a problem with icons loading in the content editor, this article will most likely help you!
Issue: If the content editor looks like this:
Instead of this:
SVGs are not being displayed. This problem is usually caused by your server not being configured to display SVG images. You may still be seeing some SVGs that have the full code injected into the page, but these SVG images are implemented as background images in CSS, that is why they won't show up if your server is not configured correctly.
Solution: There are two ways to fix this issue.
1. Tell your web host you need SVGs to work on your server. This should be a pretty easy fix on their side, so don't feel bad for asking.
2. If you have experience with editing .htaccess files, you can do it yourself by adding the content-type for SVG. You can read about the proper way to do so here: https://css-tricks.com/snippets/htaccess/serve-svg-correct-content-type/