Error: Notes Extractor folder is not valid

After validating the import settings, you may see the below error: 

The source selection is not valid. Please, select a source folder generated with Cooperteam Notes Extractor.

The Notes Extractor source folder selected is not compatible with the current SharePoint Provisioner version. Please, contact Cooperteam Support team to get the latest version of Notes Extractor (visit www.cooperteam.com for more contact details).