SureAI

don't think moving slowly in general causes this, but missing triggerboxes does.
at least I guess that's what happened here.
I'm not a dev, I don't know... anything

haven't seen a ticket in the bugtracker about that yet,
we'll change that as soon as OP confirms this solution


edit.
or maybe not.
the triggerbox spans the whole room :/
it's Enderal, you're running for your life the whole time anyway

I was assuming he was moving slowly because he had picked up too much loot and was over his weight limit.

oh, he is.
but that's not part of the bug.
(the last sentence was more of a joke)

So perhaps the cause is that i have too much junk in my inventory ?

it's probably not the immediate reason;
the stuff in your inventory is the reason you walked slowly -and that would be the reason the scene didn't trigger.
either because you missed the triggerbox (which should start the scene),
or the scene doesn't start because you walked slowly (which is, according to user stuemper, who knows stuff, unlikely)

or there's some completely unrelated bug.

did you try selling (or dropping) some stuff and running upstairs?

Something similar happened to me there too, I was through the upper door and when I arrived there pretty slowly, the conversation was already half over.
But there was no mistake with me.
Maybe you needed even longer to be there and the conversation was over. Therefore no quest trigger?

I did put most of then things i hade i the safe chest, so i wasn't over weight, and when i came up there were they are, the archmagister keep talking about the magic words. and after they talked, nothing happend. He was still busy.

hm, the scene seems completely fine with that save
you walk up there, Merrayil and Firespark should talk about that crystal and then split it.
Firespark should tell you to pick up one of the shards, and the quest continues/closes.
(you don't even really talk to Merrayil during the quest)

and that doesn't happen?
the scene just stops?
at what point? (a sentence would be nice for bugfixing )


edit
is your game up to date? (patch 1.2.5.0)

you could try to

[+] redownload the patches

- open the file config.sur in
...Steam\steamapps\common\Skyrim\EnderalLauncher\system\config (with Notepad)
- edit the line sCurrentVersion=x.x.x.x to sCurrentVersion=1.0.0.0 and save
- run the Launcher as admin and reload the patches

maybe that helps

After Merrayil and Firespark and when Firespark says " Sun be praised...working with these fumblers is harder than teaching complex mathematics to a leor. The scrounger already told me about your success, good work." After that nothing hapens Firespark don't tell me anything.

the game is up to date, i have 1.2.5.0

Ok i will try redownload the patches.

I did redownload the patches and run the launcher as admin, but not even that work. They had their talk and when Firespark finished his line and after that nothing.