if you check the script, there are 2 conditions to get the LI convo with Victoria:
first there is < if "ch4vicgoodbye" in extraevents or "ch4vicsex" in extraevents > and then < if v_score >= 6 >
if you have all of those conditions met and you still cannot access the scene, you might have a bugged save.
there is not a big issue tho, you can set the variable in the developer console:
before starting the scene with Victoria type in the dev console
$ extraevents.append("ch4vicgoodbye")
$ v_score = 6
that will solve your problem