See if you have the correct version of Fuz Ro D'oh. If you are on 1.5.97 SE, it's on the older files.
Maybe you need to progress the day by sleeping or waiting at the fireplace inside the crypt? I don't remember the details of this branch
Ikol should say something to him and let him go to the entrance below the arc. Then there should be a loading and you're inside Solitude. Perhaps you have a mod that makes changes to the outskirts of Solitude including the secret entrance?
Unless it changed with recent updates, you just need to go to Solitude, even fast travel worked. Find the horse at Kala's stable and proceed with the gate conversation.
Check if you have mods that chenga Solitude. The beggars could be stuck somewhere because of them. Trying reloading the save as well, if you don't have such mods.
If you have mods that change roads or add stuff to the river (like Northern Roads or Lux Via) it can bug the whole scene. You could use them if you delete the world references for the area.
Dogma said that there is no returning scene at the moment. He said the dialogue is mostly a placeholder because he didn't decide yet if it's necessary to add this scene.
I asked Dogma and he said there is no proper scene with Gray Fox at Madam Petit. He is a regular costumer, appears there randomly among the other NPCs. It seems there a small interaction dialogue in which the heroine can realize that the guy she is dating is him, but from what he said, it's like she only realizes later and he goes away. I didn't bother trying to see it cause he said the scene is not different from other encounters except for this small bit.
The village will be the last thing he touches during this revision. So, yeah, there is a jump in the sense that there is no new content for the village.
I think he made a patch for TNG, but don't know if it works.
And yeah, Pandora works.