Some warnings on client load.

--version, 1.16.5-forge-36.1.23
betterendforge-1.16.4-1.6.0.jar

[01Jun2021 16:50:09.245] [Render thread/WARN] [net.minecraftforge.registries.ForgeRegistry/REGISTRIES]: Registry Biome: The object minecraft:the_end has been registered twice for the same name minecraft:the_end.
[01Jun2021 16:50:09.245] [Render thread/WARN] [net.minecraftforge.registries.ForgeRegistry/REGISTRIES]: Registry Biome: The object minecraft:end_barrens has been registered twice for the same name minecraft:end_barrens.
[01Jun2021 16:50:09.245] [Render thread/WARN] [net.minecraftforge.registries.ForgeRegistry/REGISTRIES]: Registry Biome: The object minecraft:small_end_islands has been registered twice for the same name minecraft:small_end_islands.
[01Jun2021 16:50:09.245] [Render thread/WARN] [net.minecraftforge.registries.ForgeRegistry/REGISTRIES]: Registry Biome: The object minecraft:end_midlands has been registered twice for the same name minecraft:end_midlands.
[01Jun2021 16:50:09.245] [Render thread/WARN] [net.minecraftforge.registries.ForgeRegistry/REGISTRIES]: Registry Biome: The object minecraft:end_highlands has been registered twice for the same name minecraft:end_highlands.

[01Jun2021 16:50:11.993] [Render thread/WARN] [net.minecraftforge.common.ForgeHooks/]: Called deprecated GlobalEntityTypeAttributes#put for betterendforge:end_fish, use EntityAttributeCreationEvent instead.
[01Jun2021 16:50:11.993] [Render thread/WARN] [net.minecraftforge.common.ForgeHooks/]: Called deprecated GlobalEntityTypeAttributes#put for betterendforge:dragonfly, use EntityAttributeCreationEvent instead.
[01Jun2021 16:50:11.994] [Render thread/WARN] [net.minecraftforge.common.ForgeHooks/]: Called deprecated GlobalEntityTypeAttributes#put for betterendforge:shadow_walker, use EntityAttributeCreationEvent instead.
[01Jun2021 16:50:11.994] [Render thread/WARN] [net.minecraftforge.common.ForgeHooks/]: Called deprecated GlobalEntityTypeAttributes#put for betterendforge:end_slime, use EntityAttributeCreationEvent instead.
[01Jun2021 16:50:11.994] [Render thread/WARN] [net.minecraftforge.common.ForgeHooks/]: Called deprecated GlobalEntityTypeAttributes#put for betterendforge:cubozoa, use EntityAttributeCreationEvent instead.
[01Jun2021 16:50:11.994] [Render thread/WARN] [net.minecraftforge.common.ForgeHooks/]: Called deprecated GlobalEntityTypeAttributes#put for betterendforge:silk_moth, use EntityAttributeCreationEvent instead.
[01Jun2021 16:50:12.714] [Worker-Main4/WARN] [net.minecraft.client.renderer.model.ModelBakery/]: Exception loading blockstate definition: betterendforge:blockstates/pearlberry_seed.json: java.io.FileNotFoundException: betterendforge:blockstates/pearlberry_seed.json

[01Jun2021 16:50:12.715] [Worker-Main4/WARN] [net.minecraft.client.renderer.model.ModelBakery/]: Exception loading blockstate definition: 'betterendforge:blockstates/pearlberry_seed.json' missing model for variant: 'betterendforge:pearlberry_seed#age=0'
[01Jun2021 16:50:12.715] [Worker-Main4/WARN] [net.minecraft.client.renderer.model.ModelBakery/]: Exception loading blockstate definition: 'betterendforge:blockstates/pearlberry_seed.json' missing model for variant: 'betterendforge:pearlberry_seed#age=1'
[01Jun2021 16:50:12.715] [Worker-Main4/WARN] [net.minecraft.client.renderer.model.ModelBakery/]: Exception loading blockstate definition: 'betterendforge:blockstates/pearlberry_seed.json' missing model for variant: 'betterendforge:pearlberry_seed#age=2'
[01Jun2021 16:50:12.715] [Worker-Main4/WARN] [net.minecraft.client.renderer.model.ModelBakery/]: Exception loading blockstate definition: 'betterendforge:blockstates/pearlberry_seed.json' missing model for variant: 'betterendforge:pearlberry_seed#age=3'

I also receive a warning relating to pearlberry_seed:

[02:21:43] [Worker-Main106/WARN] [minecraft/ModelBakery]: Unable to load model: 'betterendforge:pearlberry_seed#inventory' referenced from: betterendforge:pearlberry_seed#inventory: {}
[02:21:43] [Worker-Main106/WARN] [minecraft/ModelBakery]: java.io.FileNotFoundException: betterendforge:models/item/pearlberry_seed.json