I just updated X and Cornerstone, and the following error(among others) is appearing on my site;
Notice: Undefined variable: _view_data in /customers/1/8/c/huntr.no/httpd.www/wp-content/plugins/cornerstone/includes/views/elements/section.php on line 67 Warning: Invalid argument supplied for foreach() in /customers/1/8/c/huntr.no/httpd.www/wp-content/plugins/cornerstone/includes/utility/element-api.php on line 210