WordPress function wp_remote_get() test failed. Not necessary server related!!
WordPress function wp_remote_get() test failed. Looks like your server is not fully compatible with WordPress. Contact your hosting provider.
Status code: 404
Status code: 404
It seems that this is not necessary server related as suggested. I have made to development websites on same server. One with an real domain, and one with a fake domain (accessed by editing hosts file). Error only occurred on website with fake domain.
Comments
BTW The same wp_remote_get() function was used for default Wordpress Importer.
P.S. The problem might be related with loopbacks as some hosting services doesn't allowe for that but it's necessary to import complete demo. More details about similar issue you can read on http://forum.muffingroup.com/betheme/discussion/12103/wp-remote-get-demo-download-no-header-menu-of-footer-settings where a problem was a little bit different but the solution may work for you as well.