Only thing I can think of is maybe the TCP connection. Go back to the first screen of the migration tool where it asks for credentials. There is a note in red that mentions TCP connections need to be allowed on the SQL servers. Check that in SQL Configuration and verify it for the Track-It! 2019 / Client Management SQL server. If that is correct, then you will probably need to contact support for some more in depth troubleshooting. You can find options for contacting them at support.trackit.com.