SureAI

After waiting 1 day you are supposed to return to tealor but he and the others just sit at the table and have their normal small talk dialogue. They don't start talking on their own and pressing E on them again just has normal dialogue.

So the story can't progress from that point on. The save is outside the emporium because even exiting and reentering or reloading doesn't fix this.

Savegames always consist of 2 files, a -.ess and a -.skse file.
So we also need the 2nd file of your savegame for the test,
put it in an archive (-.zip) to upload it here, otherwise skse will not be accepted here.

Good would also be a 2nd Savegames before you get this quest section.

It may be a known bug that rarely occurs, this is already reported and in progress.

here

I pressed submit too fast

Your current savegame I can not rescue on the fast, I do not know exactly what went wrong there,
possibly just a blocking of the relevant NPC?
If I use your older savegame, I have no problems. (even though this was already quite far away^^)

So with my attached savegames you would lose 4 levels if you didn't have another savegame that still works.

PS: I see you're leaving a lot behind, it starts yet with the old man's house. (but everybody has to decide that for himself)