[Plugin: WP Twitter Sidebar Widget] No data available on twitter.com for user

If you have recently updated the plugin you will need to open the widget and resave your information such as username and other settings and this will reinstat the data. If you are still experiencing any problems please let us know or post your comments here.

Tried that, then also delete the wp_twitter_widget entry in the options table. Tried adding it again and still have the error.

Could this be because the website is behind a Under Construction page? Does the website have to be public in order for this to work?