This WordPress page cannot be displayed.
This problem does not related to WP Google Search plugin, it is a more general page displaying problem. Regardless of the content this page (e.g. regardless of search results) this WP page cannot be displayed.
Maybe your permalink settings or a .htaccess setting is wrong, or there is a plugin conflict, that prevent this page from displaying.
You can check these, or ask your system administrator why this WP page cannot be dispalayed.
Your other pages can be displayed (not posts, but pages)?
One more idea that you can try: delete this pages, then empty the trash folder, and regenerate this by deactivating and activating WP Google Search plugin. But this will not solve the problem if a general WP or Apache or other server component settings is wrong.