So I finally got around to doing Esther's quest, and naturally it doesn't work for me.
Basically, I was able to start the quest, go to the glade (and get the dialogue), but when I go to talk to Emma, nothing happens. Am I doing something wrong?
I've already checked the Ester's Quest forum from 2011, but nothing in it helps me. Is this a retired quest? Because if so, it should be removed from the site. It's rather annoying.

I asked earlier and was told that it's only available during Vesnali. (Awesome HA!)
When I did it, it wasn't Vesnali at all. From what I remember, there wasn't notification that I'd gotten a prize, just the 50 vesnali coin thing in my inventory.
Well that's weird. But I haven't even gotten far enough for a prize to be given, and Esther's all like "check back where you left off..." Urgh.

Sounds like you're short the last step then. Have you gone back to her shop yet?
Do you get any dialog when you go to the Apocalyptic Apothecary?
Unfortunately, no. The last step I completed was going to Peka Glade, and none of the steps after that work. So, no Emma, no Lukien, no Jade, no anyone/thing.

I filed a ticket about this a few months back and it's not currently available. I was told that it might be back next Vesnali, but it might not be either.
...from a ticket I submitted a month ago.