Ensure browser console is open so you can see errors Enable and set the new TinyMCE as your preferred editor Navigate to profile from user menu Press Edit profile In the Description editor press Image Confirm no console error about undefined resource Select an image from one of the repositories Confirm image preview is shown in the modal Give the image a description (" Describe this image... ") and press save changes Press on the image inside the editor Press the Image button in the editor Confirm image preview is shown in the modal Confirm there are still not console errors about undefined resource