Drupal and WordPress login credentials not accepted

Hello there!

I am desperately trying to use your plugin to migrate a Drupal Database into WordPress. The Http connection is successful. However – the Database info of neither the Drupal site (on another domain) nor the WordPress site (manually imported exported Drupal Database) are being accepted. The Database credentials are correct in both cases but your Plugin doesn’t connect. What could be the reason?

Thanks for your help!

Umberto