As the error message says that it is expecting Start Date attribute defined on Organization Entity.
So I created an attribute Start Date on Organization. To do so you will have to create a sandbox and make the change in organization and then activate the sandbox.
But the above did not help and connector installation showed a new attribute requirement.
So I checked the connector xml file DBAT-ConnectorConfig.xml
and found that Order for flag is incorrectly set in the out-of-the-box connector package
Retry the connector install
