• The most common reason for this is because one or more of the images used for the slider is not being found. Much like a 404 error. Try going into your slider and verify that all images set with the correct paths. Then clear browser cache and any plugin cache you may have installed and reload the page.
  • Conflict with other plugins may cause this problem as well. You could try testing for a plugin conflict. You can do this by deactivating all third party plugins, and seeing if the problem remains. If it’s fixed, you’ll know a plugin caused the problem, and you can narrow down which one by reactivating them one at a time.