Thanks. When I open Files on the iPhone, it doesn’t appear (this is both on my iCloud, where I had vaults before, and in the local iPhone folder, where I keep my vault now since using Obsidian Sync). I then connected my iPhone to my Mac and went to the phone in Finder. Here I could see the folder “Inbox” under the local Obsidian folder, but when I try to delete it, the message comes up whether I really want to delete it, “yes”, and then nothing happens besides the folder is 0kb in size. But it is still there, and Obsidian on the phone is still stuck on the attached error message.
I really don’t know how that folder came in there, and I can see that it was created back in june 2021 before I used Obsidian on a local iPhone folder.