Something similar happened to me as well, except only one household has disappeared, and my tray folder is completely intact. I even see what I think could possibly be their file in there. I tried reloading the tray file by removing the items in it and making the game create a new one, then replacing them, but it didn't fix the issue. Please help!!
@mizutheseaweed Each entry in the in-game library has several Tray files associated with it, and all the files are necessary to make the Library entry show up properly. You can sort the files by modified date: all files corresponding to a particular Library entry will have exactly the same timestamp, which will likely not match the timestamp of any other files.
Please move your Tray folder to your desktop, launch the game to create a new folder, quit, and move one set of files to the new folder at a time, as in, one group of files with the same timestamp. Check in-game to see whether a given entry shows up, and if it does, you can set it aside and move on to the next set of files.
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