I am playing on a multiplayer server. My partner completed Leif quest some time ago, and now I tried to finish it as well.

In the last quest (You have been gone for HOW LONG?) I used the teleporter and got teleported into Leif world. The problem is that there was no Rem there (maybe because she became a shopkeeper after my partner finished the quest with second island earlier?). I was running around for some time not knowing what to do. I've cut down the tree where Leif's prison is, so now it hangs awkwardly in the air, I've cut down the tree in the center, I've emptied all the houses. I have found only three quest items (including the one in the tree) and I'm 100% certain there is no more because I've torn apart all of the houses. I think they might've fallen down.

I have no idea what to do. I am stuck in Leif's world. Leif is not present in the main world anymore. Is there any way to fix that?