[sgqwonkian]

Is this an actual copy-paste, or just a paraphrase?
I ask because since PAGE 1 doesn't have a ACTN popup, I don't think it should be displaying anything to tell you it's triggered PAGE 1 instead of PAGE 0. I would think as written, nothing would happen rather than text showing up to tell you "nothing much happens".

If it's not triggering at all, the problem could be any of these:
a) the quest isn't listed in your game.ini file
b) you don't have a STAR block, or there's an error in the STAR block so it's not sure where to trigger
c) since you don't have a DISP 1 line before the ACTN popup line it could be displaying the text to somewhere other than where you're looking/expecting, most likely a planet exploration window behind whatever else is going on at the time.
d) the planet has been previously explored before you got the Ambassador


If it's actually displaying the text "Nothing much happens" and the code in your post is verbatim quote from a quest file, then I'm stumped. Hopefully somebody else will see something I've missed.