PakRat91

I have KSC 2019 installed on my sons sys. He uses steam to play his games. He tries launching Rainbow Six Siege and gets a "A ubisoft service is unavailable" error. I've researched it a little and it says to allow it through the firewall. Shouldnt KSC notify me and auto set this up? And how do I safely allow something through my firewall while keeping my protection intact? Any help would be great. Oh i have Windows 10 latest updates.