how long have you had this prompt? In my playthrough (and I might be remembering this wrong) the event triggered about a week after I got the prompt, it might have been waiting for some other trigger (another story event or day of the week), or it might have some kind of countdown I don't know. It might be worth waiting a week or two, just hitting random locations to see if something triggers
And I can't stress this enough, my memory is shit, I haven't played this version yet, I tend to play every second or third update in an effort to keep things fun, I hate traffic jam play, with stopping and starting just to crawl forward a few feet to stop again.
