The Binding of Isaac: Rebirth

The Binding of Isaac: Rebirth

Binding of Isaac - Afterbirth+ Workshop
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Having trouble getting a very simple mod to work.
I simply reskinned the fire file, and it refuses to show in game. I used to mod whole bosses, enemies, items, even some of the UI with no issues, and now I cannot figure out why this very simple mod I created will not work... It is a personal mod called My Reskins in my mod folder, which is how i used to mod before with the more intricate files.

At first, I thought that maybe I had a mod enabled that over-rode my file, but even disabling all other mods didn't work. I have checked the folder path many times and it is correct. I even made my own metadata file! Before, I used another mod's metadata file, but I didn't upload any of my mods so it didn't matter because it was personal use. My new simple fire reskin didn't work when I tried that as well, thinking I created the metadata file wrong.

Does anyone know what could POSSIBLY be the issue?!