Import without WP Importer

To all the people that might have issues getting wptest.io's WP test data into current version WP 4.5 ->> give this new separately developed WP Importer a shot.

https://github.com/humanmade/WordPress-Importer

More about this new WP Importer here

http://wptavern.com/help-test-the-new-wordpress-importer-plugin-in-development

and here.

https://make.wordpress.org/core/2015/11/18/wordpress-importer-redux/

Hope this works and hope this info helps people that have had no luck with the old WP Importer that can be found here.