If the Course Thumbnail image is blank you can try the following;

  1. Make a temporary content change in one of the text fields in the project
  2. Removed the change and save
  3. Refresh the main project screen

The thumbnail image should now present. If a course is missing the main thumbnail image this can prevent it from publishing.

If the thumbnail is still not showing you can try the following;

  1. Update the course using the following method > https://gomolearning.freshdesk.com/support/solutions/articles/11000037970-updating-a-course 
  2. Also try removing the word (imported) from any topic title, save, you can re-add if necessary

Once all complete > log out and back into Gomo to confirm image has appeared