Errors in startup Errorlog:

[28May2021 03:23:34.483] [Worker-Main-9/WARN] [net.minecraft.client.renderer.model.ModelBakery/]: Unable to resolve texture reference: #missing in sophisticatedbackpacks:block/netherite_backpack
[28May2021 03:23:34.484] [Worker-Main-9/WARN] [net.minecraft.client.renderer.model.ModelBakery/]: Unable to resolve texture reference: #missing in sophisticatedbackpacks:block/backpack
[28May2021 03:23:34.484] [Worker-Main-9/WARN] [net.minecraft.client.renderer.model.ModelBakery/]: Unable to resolve texture reference: #missing in sophisticatedbackpacks:block/gold_backpack
[28May2021 03:23:34.484] [Worker-Main-9/WARN] [net.minecraft.client.renderer.model.ModelBakery/]: Unable to resolve texture reference: #missing in sophisticatedbackpacks:item/iron_backpack
[28May2021 03:23:34.484] [Worker-Main-9/WARN] [net.minecraft.client.renderer.model.ModelBakery/]: Unable to resolve texture reference: #missing in sophisticatedbackpacks:block/diamond_backpack
[28May2021 03:23:34.484] [Worker-Main-9/WARN] [net.minecraft.client.renderer.model.ModelBakery/]: Unable to resolve texture reference: #missing in sophisticatedbackpacks:block/iron_backpack
[28May2021 03:23:34.484] [Worker-Main-9/WARN] [net.minecraft.client.renderer.model.ModelBakery/]: Unable to resolve texture reference: #missing in sophisticatedbackpacks:item/gold_backpack
[28May2021 03:23:34.484] [Worker-Main-9/WARN] [net.minecraft.client.renderer.model.ModelBakery/]: Unable to resolve texture reference: #missing in sophisticatedbackpacks:item/netherite_backpack
[28May2021 03:23:34.484] [Worker-Main-9/WARN] [net.minecraft.client.renderer.model.ModelBakery/]: Unable to resolve texture reference: #missing in sophisticatedbackpacks:item/diamond_backpack

Versions
mod ver 1.16.4-2.4.0.259
forge ver 36.1.0