i have the exact same problem, im on php 7.2 Its not just warning that i can turn off. In the ID field there is this: “<br /><b>Warning</b>: Illegal string offset ‘ga_id’ in <b>/home/theculx3/public_html/wp-content/plugins/enhanced-e-commerce-for-woocommerce-store/admin/partials/general-fields.php</b> on line <b>24</b><br />”
of course that is doesnt work, and if i try to put the google analytics ID it doesnt change it. It go back with error and that strange code.
Thanks for the great plugin.
I also have this problem with the “COD hide message”. Any update soon?