HTTP Error 500 (Internal Server Error) while attempting to edit a page

After installing and activating the Google Analytics Dashboard plugin, I am unable to edit any pages or posts.

See screencast: http://screencast.com/t/OojAjNv33PoY

When activated the dashboard works great and is pulling in data.

Any idea how to fix this?

http://ww.wp.xz.cn/extend/plugins/google-analytics-dashboard/