aaronneedshelp on "[Plugin: JC Importer] Error: Whoops, the provided date is invalid."

I can't get past the date format... I've tried CSV and XML file type... yyyy-mm-dd 00:00:00

For example:
2016-06-24 00:00:00
2016-06-26 00:00:00
2016-06-24 00:00:00
2016-06-24 00:00:01
2016-06-24 00:00:02
2016-06-24 00:00:03
2016-06-24 00:00:04
2016-06-24 00:00:05
2016-06-21 00:00:06

Consistently says "Error: Whoops, the provided date is invalid."

Can you help me please? I'm running out of steam on this.

Hope all is well,

Aaron

https://wordpress.org/plugins/jc-importer/