Upgrading to 4.7.21 on Wordpress get uncaught exception on status page
Status page failed to load, giving an uncaught exception error.   
Loaded the upgrade url directly -->https://xxx/wp-admin/admin.php?page=CiviCRM&amp;q=civicrm/upgrade&amp;reset=1.
This ran the update 
Status page now loaded, with option to rebuild indices