Could not find the post parent for various posts
Using WordPress Importer Redux I am getting an almost 100% import when importing the test data from wptest.io.
Well one single "term" is missing.

It tells me that it could not find the post parent for various posts.

What does this mean please? Do you have a clue? Is this wptest.io related or really an issue with this plugin?
BTW I am super super happy to have found this new version of the plugin. The one from wordpress.org was irritating me tremendously. Thank you very very much for your work on WordPress Importer Redux!!
Thanks for your report! http://wptest.io/ surely is a nice place for getting some test data for the importer.
I'll try to look into it soon-ish.
The test data from wptest.io does have a few problems IIRC, but we should work out a way of displaying this better.
Right now, we're using the HTML5 progress element, but this should probably be switched to custom CSS that we can display errors on as well.
With latest version of the importer as of today and a fresh default WP 4.5.3 install, when doing the import of the WP Test test data the outcome is exactly the same. One single "term" is missing and these warnings come up.
warning Could not find the post parent for "" (post #1148) warning Could not find the post parent for "" (post #1149) warning Could not find the post parent for "" (post #1150) warning Could not find the post parent for "" (post #1151) warning Could not find the post parent for "" (post #1152) warning Could not find the post parent for "" (post #1153)