Sourov Chowdhury

Hi Martin,

Can you please try to enable Opcache save comments by contacting Kinsta live chat? This may solve your issue.

I use this code, It’s worked perfectly for me

function filter_ninja_forms_localize_fields( $field ) { 

    if( is_array($field['settings']) && array_key_exists("label", $field['settings']) ){
        $field['settings']['label'] = esc_html__( $field['settings']['label'], "keyboardpro"); 
    }

    return $field; 
}
add_filter( 'ninja_forms_localize_fields', 'filter_ninja_forms_localize_fields', 10, 1 ); 

I Update my WordPress to 4.6 and face the same problem, I don’t know why this happen.