I have been having the same issue. I place a vehicle in the garage and then I am unable to do anything. I tried uninstalling it and then re-installing it to no avail. I did have it downloaded on an external hard drive so now I am uninstalling it and having it download onto my ps4 versus my external hard rive to see if it works. I had some intermittent crashes before the updat, but since the update has made the game unplayable.