I'm at the part of the main quest where I talk to Panam at the garage, after I helped her get her truck back and kill Nash and his gang. After the briefing, whenever I hop into the truck, just before it leaves the garage, I would get a loading screen. I am then stuck there as the progress bar never goes over 10% and I get the spinning wheel. I've already verified by game files on GOG, but that doesn't seem to have fixed anything. I've not run into any other problems prior to this. Not sure...

Stuck a Loading screen for Panam/Hellman quest