Failed to connect to Veeam Replication and Backup Server

[WORKS2019]

I installed Veeam Backup and Replication and it worked fine. I uninstalled because I thought it would be installed on a different computer. I then installed Veeam One to test and uninstalled. Now when I install Backup and Replication I get the error message:

Failed to connect to the Veeam Backup and Replication Server: No connection could be made because the target machine actively refused it 192.168.0.153:9392.

What I've tried so far.
- changed local host to ip address
- changed local host to computer name
- changed the user account password and confirmed user is local administrator
- checked and unchecked "Use Windows session Authentication"

[foggy]

Might be caused by different build numbers of some shared components that were not uninstalled completely or something like that. Please contact technical support, for check/cleanup.