Google Adsense broken

When I activate the plugin, I get the following error message:

Fatal error: Call to a member function get() on a non-object in /home/t…..m/public_html/b…..t/wp-content/plugins/google-adsense-lite/providers.php on line 506

This the Google Adsense Plugin from Manoj Thulasidas. I recently upgraded both WordPress and the plugin to the latest version. All other plugins and features work fine.