Warning: require(/htdocs/wp-includes/class-wp-filter-sentinel.php): Failed to open stream: No such file or directory in /htdocs/wp-includes/plugin.php on line 26

Fatal error: Uncaught Error: Failed opening required '/htdocs/wp-includes/class-wp-filter-sentinel.php' (include_path='.:') in /htdocs/wp-includes/plugin.php:26 Stack trace: #0 /htdocs/wp-settings.php(53): require_once() #1 /htdocs/wp-config.php(89): require_once('/htdocs/wp-sett...') #2 /htdocs/wp-load.php(50): require_once('/htdocs/wp-conf...') #3 /htdocs/wp-blog-header.php(13): require_once('/htdocs/wp-load...') #4 /htdocs/index.php(17): require('/htdocs/wp-blog...') #5 {main} thrown in /htdocs/wp-includes/plugin.php on line 26