Just had the same problem. Actually, I started missing the cutscene after the Forever update. I had already played the game once before that and then the cutscene was in place.
Edit: looks like Steam users also have this problem ocasionaly: https://steamcommunity.com/app/488960/discussions/0/1697169163396552894
Are you still seeing this in the updated Star Vikings Forever version of the game?
I recently played through Star Vikings Forever and had this exact issue on my first playthrough. I am using the linux version of the game. Otherwise, the game plays fine. It was rather strange to have a bunch of things in the game suddenly change and have no idea why.
update: I found a video that has the cutscene, in case anyone wants to see what they missed, though it's from a playthrough of the beta version, so it might not be the same: https://www.youtube.com/watch?v=afRRZYPFMGM