SwitchboardListener doesnt run on second machine

Development Programming & Scripting
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1

When I run SwitchboardListener.exe on my machine it runs without a hitch. I have pulled it from the engine binaries and grabbed all the required binaries for it to run and packaged it seperatley to be deployed onto listener machines. When I unzip it onto those secondary machines, it will not run. I am running it as headless through gitbash with the following command
./SwitchboardListener.exe -NullRHI -nosound -port=(uniqueport#)
On the secondary machines, it runs to the point of LogSwitchboard: Display: Initialized but NOT LogSwitchboard: Display: Started Listening, so it cannot connect to my main Switchboard instance. I have tried:
Restarting pc
Trying unique ports
Running as admin
Running on 3 different machines
Running with machine specific IP through the -ip= cmd line arg

Any thoughts are greatly welcome, I’ve been stuck on this for over a day ATP…

2

So, running it on a 4th machine didnt work, but running it on a 5th machine which DOES have Unreal Engine installed (the previous 4 didnt) allowed it to work. However, installing unreal engine on all the listening machines isnt possible…