Sorry, my Child Theme was missing the: “Template: Name” in the css file.
Edited:
I got a similar problem, but in my case, the Child Theme was missing the: Template: Name in the style.css
I add the same issue.
Wen i add my admin session opened, i could see the slides,
but in “public” mode i couldn’t.
After disabling W3 Total Cache it resolves the problem.
I thing the problem is regarding to an W3 Total Cache update.