Thanks John, I’m actually just tweaking the live site now, not working on a development site, that’s why i didn’t have the WP_DEBUG on.
But you are a genius, that sorts the problem, and fixes my issue. Still strange that ACF works that way.
Thank you for your help.
Thanks John, i see what you mean, but unfortunately that code gave my site an error “There has been a critical error on this website.”.