(10061 - No connection could be made because the target machine actively refused it.)
Unable to start agent on machinename (10061 - No connection could be made because the target machine actively refused it.), attempting locally.
UltraBac launches a UB.exe process on a machine when a backup is started. This warning indicates UB.exe was not able to start on the remote machine and the backup server is going to attempt to host the process locally.
This is generally caused by an active firewall inhibiting the process from starting.
Add the UltraBac exceptions into the firewall to resolve the issue.
TCP/IP Port 1910