Warning: require_once(//wp-admin/includes/plugin.php): Failed to open stream: No such file or directory in /wp-settings.php on line 527

Fatal error: Uncaught Error: Failed opening required '//wp-admin/includes/plugin.php' (include_path='.:') in /wp-settings.php:527 Stack trace: #0 /wp-config.php(104): require_once() #1 /wp-load.php(50): require_once('/wp-config.php') #2 /wp-blog-header.php(13): require_once('/wp-load.php') #3 /index.php(17): require('/wp-blog-header...') #4 {main} thrown in /wp-settings.php on line 527