When I try to switch to another theme, it gives me this error again
Warning: require_once(/home/tgapw/www7/wp-admin/includes/class-wp-list-table.php) [function.require-once]: failed to open stream: No such file or directory in /home/tgapw/www7/wp-content/themes/sensible-wp/panel/class-tgm-plugin-activation.php on line 2127