ODM Sharepoint migration error, "The Owner property is required for site creation and was not supplied" (4346383)

When migrating SharePoint Site Collections with On Demand Migration (ODM), you may encounter the following error:

The Owner property is required for site creation and was not supplied

The following steps should resolve this issue:

1.) Open the ODM SharePoint migration project

2.) Click Configure Project

3.) Enter the UPN of the default target owner you would like to use in situations where the real source owner not yet mapped/migrated to the target Office 365 tenant within the ODM Accounts project:

4.) Click Save

5.) Create a new ODM SharePoint migration task for the site collection you are trying to migrate