Hello Rose,
I did as I said but I still have the same problem, I deactivated all the plugins and left only the Slider Revolution, but broke the theme due to needing the WPBakery Page Builder, then I activated the Bakery and even then the Slider did not work, it presents the same error .
I activated the parent theme and without success only with these two active plugins.
I await your next interaction!
Best regards,
Rodrigo M.