I had this last night, turned out I was in the wrong system. Not sure whether I made a mistake or the target system changed unannounced, but it was quickly solved by looking at the galmap & seeing where a mission flag remained after I'd completed all the others I'd taken on in that session.Not even sure this is worth the typing. But here goes.
Took a assassination mission then spent 3 hours scanning system for him.
Including jumping into Nav beacon and Using my discovery scanner. Also checking All targets popping up.
No Sign of him. So cancelled the mission and took a hit with Reputation.
Is this now the normal procedure?
Or yet another BUG introduced by FD to screw a perfectly good system which was good before?