Thank you Signals,
Turning off the firewall (this is a device that protects our entire home network) is of course not a realistic option, at that moment our entire network is vulnerable.
All that is needed is to open the port(s) that StreamFab needs to function for the PC where StreamFab is installed in the firewall .
Unfortunately, the Ubiquity firewall does not contain functonality to find out which port(s) is(are) blocked, so that's why the question...
HuubL
have you tried resetting your firewall back to factory default settings ??
when doing so, it should allow you to let streamfab through the next time you start it.
also, make sure that you have windows firewall disabled since you are using a 3rd party firewall
as it might cause problems.