I am getting a similar message:
Warning: Missing argument 2 for Nelio_Content_External_Featured_Image_Public::maybe_add_efi_as_background(), called in /janellereston/wp-includes/class-wp-hook.php on line 298 and defined in /janellereston/wp-content/plugins/nelio-content/public/class-nelio-content-external-featured-image-public.php on line 285
I have deactivated the plugin since this was visible to all visitors, but that didn’t get rid of the message despite the fact I cleared the caches. Yikes.
Deleting the plugin made the message go away, thank goodness.
