Most likely the content you try to edit has been created by other means (without using our Content Editor). MotoPress Content Editor plugin doesn't support drag and drop functionality for the previously created content as it's not possible to analyze every custom solution. You see each visual builder plugin can recognize its own shortcodes and structure. Thus, such content will be viewed in MotoPress Content Editor as a single block that you can not interact with much. You can add new elements above, below or aside of that block of content. There are two options of how to edit such content:
- Keep editing this page in a way it was created i.e. using the same editor that was used for adding this content
- Recreate the same content using the tools of MotoPress Content Editor. Alo you can use it at new pages blog posts and custom post types. It would be fast and easy.