I have a Custom Field setup that uses Tabs for Vehicle Details, Features and Information plus one tab labelled ‘Images’, which contains a ‘Gallery’ field. Within the box where you can drag’n’drop images for uploading etc, I have this warning message:
Warning: Invalid argument supplied for foreach() in /Users/huw/Sites/mamp/CraigPearce/blankmountaincampervans/wp-content/plugins/acf-gallery/gallery.php on line 109
If I create a standalone Gallery field (not within a tab) then there is no warning message.
I am using ACF V 4.3.8 and the Gallery add-on V 1.11