Cannot import mail from The Bat!

When attempting to import my mail from The Bat! Professional (v4.2.44) eM Client asks me for a folder to import to, but then crashes with the following error message, no matter what path I enter or create: “An error occurred during the import. The path is not of a legal form”. Why is this and how can I get beyond this problem ? I have tried using both v4 and v5 of eM Client.

Can you please enable “Import” logging in Tools -. Settings - Advanced, try to import it again and send us the logs? Thank you.