Thread:Extension talk:Widgets/Widgets: Smarty error 2

I'm fairly new to MediaWiki and trying to install Widgets. I'm receiving the following error when trying to use one of the widgets (I tried google spreadsheet, and youtube): Warning: Smarty error: unable to read resource: "wiki:YouTube" in /var/www/html/wiki/extensions/Widgets/smarty/Smarty.class.php on line 1095 I followed the installation instructions and went through the troubleshooting errors (I'm sure I'm spelling everything correctly, because I just copied from the webpages, and I've also purged the page to make sure it's reloading from the source)

Do you have any suggestions for what might be wrong? I'm not sure what other details would be useful here, but please let me know. Your help is appreciated.

Thanks! Klurie