I'm having a similar problem, I planned all of the crew as normal in the club, and left afterwards as I had to go. Upon coming back, and waiting for at least an hour and a half, switching between characters and doing all the side missions I possibly can, I'm not getting any emails, no markers on my map, and there are no cars spawning at any of the locations. Please help, my save that I had last was around 20%, and I will have to replay hours of content just to get back to where I am now. I've also tried getting a car for the getaway vehicle, but I'm not getting any signs that that's what I'm supposed to be doing, as normally it will say whether the car can be used for a getaway, but in this case there is no notification at all. For reference I chose the obvious approach.