Hi Vitalii, thanks for sharing the solution – how did you disable html minification for json requests? Not sure if that was via a caching plugin you have, or some setting for ACF/Gutenberg. I have the same error message as you.
Thanks John, have emailed support. The backend is fine for me, that looks like the same issue only on the front-end.
With the latest version I’m finding some posts would return nothing for have_rows when others would work fine.
It seems that if multiple have_rows calls are made to the same field for some reason within the page load logic, it doesn’t always work. Looking into it more.
Thanks John, much appreciated.
I was having a lot of trouble with ‘headers already sent’ in an elaborately coded theme.
Solution that goes in functions.php:
add_action( 'init', 'brandpage_form_head' );
function brandpage_form_head(){
acf_form_head();
}
This will add it on every page, you could add an if statement to just get it just on your form page.