@rps what does the code in your theme look like?
something like this?
if( function_exists('acf_add_local_field_group') ):
// ... code to register field group
if it does then try putting it into a action like this
add_action('init', 'load_theme_acf_groups');
function load_theme_acf_groups() {
if( function_exists('acf_add_local_field_group') ):
// ... code to register field group
}
I don’t know that this will solve the problem, but it can’t hurt to try
