So after the mission briefing of "The Heist" I did a lot of side missions and exploration. When I attempted to return to the mission after equipping the business suit, the quest log tells me to get into the car. When I arrive at the mission marker, Jackie is there leaning against thin air. I assume that's where the car is supposed to be. But there is no car.

There is no "F" button interaction popping up, so it's not like the car is just invisible. It is completely missing. I tried teleporting and driving around in the hope that getting away far enough would make it reset, but no luck. Also restarting the game and using the verify/repair option in GOG Galaxy didn't help either. Game version is the current latest patch 1.04.

I can't make the car appear and thus can't progress. Any suggestion besides starting a new playthrough?

Patch 1.05 solved it for me.