bigmansyello

Recently my friends and I have been playing a world hosted on aternos but were planning to switch to minehut once 1.17 was supported. Now that it is, I attempted to port the world over but experienced some difficulty. I was able to successfully upload the world, however when testing all of my items and builds were gone, with only entities and the world seed generation remaining. Has anyone else experienced this problem? And if so, how could I remedy this?