Structure NBT file not loadable

Hi! I'm working on replacing one of the in game structures with a slightly modified variant of itself. However, I seem to be running into a bit of a snag -- having tried several NBT files from structures I created in game, when loaded in game, nothing appears. I can use /locate structure [name] and be given coordinates for its location, but nothing is there (I checked underground and the surrounding area as well). I can use /place structure [name], and it recognizes the namespace I've created, but nothing is placed. The same occurs when using a structure block to load the structure.
I was working off this tutorial, following it to the letter, and the problem persists, so I'm either missing something, or this information isn't up to date? https://minecraft.wiki/w/Tutorial:Custom_structures#Structure_NBT
This is on the most recent snapshot, 1.26.6 pre-release 4.