Fatal error: Uncaught Error: Class 'acf_field' not found in C:\xampp\htdocs\wp-content\plugins\advanced-custom-fields\includes\fields\class-acf-field-url.php:8 Stack trace: #0 {main} thrown in C:\xampp\htdocs\wp-content\plugins\advanced-custom-fields\includes\fields\class-acf-field-url.php on line 8