[Plugin: WP Web Scraper] WP WEB Scrapper

Need help when i put the following shortcode into post
[wpws url=”http://google.com” selector=”body” user_agent=”My Bot” on_error=”error_show”]
it show google but when i change the domain by any name it show error or blank page.

and second thing

i didn’t see any button in text editor where i can find the button for scrap?

Many Thanks,

http://ww.wp.xz.cn/extend/plugins/wp-web-scrapper/