Item Texture Render Help?

This is probably something that I should know or that has an easy fix. I made a custom ore that will spawn in the world and  everything is alright. However, the Chestplate, leggings, boots, axe, hoe, and various other essential items have failed to load their textures. The crafting recipes and usability is all as it should be, but the appearance in my inventory and hotbar are just your classic failed-to-render black and purple checker. Also, specifically for armor, the texture that i see once i put it on (the 3D model or whatever) is all fine and loaded.

When I looked in the console for the error, it said 'broken aspect ratio and animations.' I had made everything exactly to scale with all of vanilla Minecraft's tools, with the same aspect ratio and such. Is there a limit to the size of an item? Any help would be greatly appreciated.