I tried to play it, but after I clicked the sign that says, "Click me to start." and spawned in the house, I think the commands stopped working. I wasn't getting raw text in the chat, the furniture that the commands were supposed to add was invisible, although the couch in front of the TV and the table and chairs in the corner near the kitchen were emitting gray swirly particles, like they were just under the invisibility effect, and when I entered the bedroom, the map didn't start. Here is everything that I think might have been the problem.
I'm playing on version 1.12
The internet sites that the link in the OP led me to were unsafe
When I unzipped the file, there were two files inside it. One was the map, and the other one was called, _MACOSX. I don't know what that last one was, so I just left it in the saves directory.
The very first thing I did in the world was place a command block at the center of the wooden platform where you spawn, which I later found out has a cluster of other command blocks underneath the block I placed mine on, and I copied and pasted the furniture command into my block. I'm not actually sure if this is the problem because since then, I have deleted and reinstalled the world twice and haven't re-implemented the command a second time.
I can't pretend to understand how the commands work, so I can't fix the world myself. Does anyone have any ideas how to fix it?:unsure:
Yeah, I also tried it in 1.12. After switching to creative mode and checking some command blocks, I see what caused the problem: in 1.11, entity ID's were changed, which causes some command blocks to throw errors when checking for entities. So, the map should work in 1.9 and 1.10 as well, but I haven't checked. Just an FYI in case someone wants to update the command blocks (I don't know a better way of doing it than checking every command block by hand, but I'm sure someone knows how to make a script to check all of them real quick).