Fatal error: Cannot declare class WP_User_Request, because the name is already in use in /home/platne/serwer26620/public_html/wp-includes/user.php on line 3529

Fatal error: Uncaught Error: Call to undefined function wp_is_maintenance_mode() in /home/platne/serwer26620/public_html/wp-includes/class-wp-fatal-error-handler.php:34 Stack trace: #0 [internal function]: WP_Fatal_Error_Handler->handle() #1 {main} thrown in /home/platne/serwer26620/public_html/wp-includes/class-wp-fatal-error-handler.php on line 34