Fatal error: Uncaught Error: Interface 'Google\Site_Kit\Core\Guards\Guard_Interface' not found in C:\xampp\htdocs\wp-content\plugins\google-site-kit\includes\Core\Authentication\Guards\Using_Proxy_Connection_Guard.php:23 Stack trace: #0 {main} thrown in C:\xampp\htdocs\wp-content\plugins\google-site-kit\includes\Core\Authentication\Guards\Using_Proxy_Connection_Guard.php on line 23