When installing TX on a server without SQL Server installed, you need to install a couple of components to make it work. It would be nice if the msi file for the installation checks for these prerequisites and installs it automatically when needed.
These posts describe what needs to be done:
https://support.timextender.com/hc/en-us/articles/210437683-Error-Could-not-load-file-or-assembly-Microsoft-SqlServer-DTSRuntimeWrap-
https://support.timextender.com/hc/en-us/articles/210437663-Error-Could-not-load-file-or-assembly-Microsoft-SqlServer-ConnectionInfo-
https://support.timextender.com/hc/en-us/articles/213530403-Discovery-Hub-Prerequisites
