The editor works great, however popups are not visible. For example when I click on an image, it doesn't show the controls for it. Is there any option I'm missing?
Such a problem might happen when the editor is inside a modal or other DOM element which has a higher z-index set in CSS. By default, the editor has z-index property set to 1, therefore its UX components might appear just underneath other DOM elements from the page.
There is a built-in option called zIndex which can be passed upon initialization to make the popups and other UX helpers appear on top of other elements from the page. Usually, changing the zIndex option to a higher value such as 9990 should fix the problem.