Thread:Extension talk:Widgets/Error returned when trying to view a page containing a widget

I can create pages in the Widget: namespace, and the Widgets extension is installed, but whenever I try to save or preview a page with the code to include a widget in, I get the following error message: "Fatal error: Smarty error: the $compile_dir '/var/www/theopenglobe.org/w/extensions/Widgets/compiled_templates/' does not exist, or is not a directory. in /etc/wikiglobal/mw/extensions/Widgets/smarty/Smarty.class.php on line 1093" What is causing this, and how can it be fixed?