"The migration was interrupted due to a pause or shutdown request."
The connection to the Source or Destination was interrupted. Typically, this means that the connection was terminated by the server within your environment, but can also be caused by networking issues.
This issue is typically transient and simply waiting a few minutes and trying again will allow the migration to proceed. If this issue is seen repeatedly, it could be an indication that the host server is overloaded or that throttling has been imposed. In these cases, it is recommended to lower the number of concurrent migrations to the environment and attempt the migration again.