Warning: require_once(modules/admin/tenant_functions.php): Failed to open stream: No such file or directory in /var/www/openeclass/include/lib/hierarchy.class.php on line 21

Fatal error: Uncaught Error: Failed opening required 'modules/admin/tenant_functions.php' (include_path='.:/usr/share/php') in /var/www/openeclass/include/lib/hierarchy.class.php:21 Stack trace: #0 /var/www/openeclass/include/main_lib.php(39): require_once() #1 /var/www/openeclass/modules/help/help.php(30): include('...') #2 {main} thrown in /var/www/openeclass/include/lib/hierarchy.class.php on line 21