"[23:58:51] [Worker-Main-4/WARN] [minecraft/ModelBakery]: Exception loading blockstate definition: 'terraflora:blockstates/sakura_log.json' in resourcepack: 'Mod Resources' for variant: 'axis=z': Unknown blockstate property: 'axis'
"

that's all it says when I test in game and the blocks load untextured paste bin link to log is: https://pastebin.com/6gsEKyfby . I have no clue what I did wrong.

 

is this your Mod?
if yes post Block class

package terraflora.terravolt.terraflora.init;

import java.util.function.Function;

import com.google.common.base.Supplier;

import net.minecraft.world.item.BlockItem;
import net.minecraft.world.item.Item;
import net.minecraft.world.level.block.Block;
import net.minecraft.world.level.block.SoundType;
import net.minecraft.world.level.block.state.BlockBehaviour;
import net.minecraft.world.level.material.Material;
import net.minecraft.world.level.material.MaterialColor;
import net.minecraftforge.registries.DeferredRegister;
import net.minecraftforge.registries.ForgeRegistries;
import net.minecraftforge.registries.RegistryObject;
import terraflora.terravolt.terraflora.terraflora;

public class BlockInit {
    public static final DeferredRegister<Block> BLOCKS = DeferredRegister.create(ForgeRegistries.BLOCKS, terraflora.MOD_ID);
    
    public static final DeferredRegister<Item> ITEMS = ItemInit.ITEMS;
    
    public static final RegistryObject<Block> SAKURA_LOG = register("sakura_log", 
            () -> new Block(BlockBehaviour.Properties.of(Material.WOOD, MaterialColor.COLOR_PURPLE ).strength(3.0f).sound(SoundType.WOOD)), 
            object -> () -> new BlockItem(object.get(),new Item.Properties().tab(terraflora.TERRAFLORA)));

    public static final RegistryObject<Block> SAKURA_LEAVS = register("sakura_leaves", 
            () -> new Block(BlockBehaviour.Properties.of(Material.LEAVES, MaterialColor.COLOR_PURPLE ).strength(1.0f).sound(SoundType.GRASS)), 
            object -> () -> new BlockItem(object.get(), new Item.Properties().tab(terraflora.TERRAFLORA)));

    
    private static <T extends Block> RegistryObject<T> registerBlock(final String name,
            final Supplier<? extends T> block) {
        return BLOCKS.register(name, block);
    }

    private static <T extends Block> RegistryObject<T> register(final String name, final Supplier<? extends T> block,
            Function<RegistryObject<T>, Supplier<? extends Item>> item) {
        RegistryObject<T> obj = registerBlock(name, block);
        ITEMS.register(name, item.apply(obj));
        return obj;
    }}

57 minutes ago, Elijah_Blair said:

Block

the normal Block does not have any BlockStateProperty,
if you want to create a log Block you need to create a new RotatedPillarBlock

ok, thanks