Textures and models not loading, leading to crash

[NimonoSolenze]

I added the alpha build of MineChem for version 1.12.2 to my pack, but for some reason, the game adamantly refuses to load the textures or models, as seen in this image- this leads to a crash if anything tries to load a model such as the Microscope. Easiest way to trigger that is to check JEI, or even just see its tab in Creative. I opened the .jar in a file viewer, and have confirmed all the models and textures are there, they're just...not loading for some reason. I downloaded the .jar from the alpha-build page of the website. I'm not sure if there's a mod conflict, or if perhaps the download didn't save correctly. I am not using any resource packs, the game is running default.

Installed mods and libraries:

Actually Additions
AgriCraft
Akashic Tome
Applied Energistics 2
Arcane Archives
Astral Sorcery
AutoRegLib
Avaritia
Baubles
bdlib
Better Builder's Wands
Biomes o Plenty
Botania
Brandon's Core
Chicken Chunks
Chisel
Chisel & Bits
CodeChickenLib
CoFH Core/World
CraftTweaker 2
Connected Tile Mod
Cucumber
Draconic Evolution
Ender Storage
Extended Crafting
Extra Cells 2
Extreme Reactors
FoamFix
Forestry
Forgelin
Gendustry
Guide-API
HammerCore
HWYLA
ICBM-Classic
Immersive Engineering
Industrial Foregoing
infinitylib
Integration Foregoing
JEI
JEI Bees
JourneyMap
librarianlib
Magic Bees
Mantle
Mekanism + Mek Generators + Mek Tools
Minechem
MineTweaker RecipeMaker
Modular Routers
More Bees
Mystical Agriculture
Mystical Agradditions
mysticallib
Netherending Ores
NEI
OpenComputers
p455w0rdslib
RedstoneFlux
RFTools + RFTools Control
Roguelike Dungeons
Silent Boss
Simply Jetpacks 2
Solar Flux Reborn
Tesla + Tesla core lib
Thaumcraft
Thaumic Additions
Thaumic Energistics
Thermal Foundation + Expansion + Dynamics
Tombstone
VanillaFix
Veinminer
Waila Harvestability
Waystones
Wizardry
zerocore