Feature: Not a JSON object: - Console Spam

[04:55:50] ain/ERROR]: Feature: Not a JSON object: "minecraft:disk_gravel"; Not a JSON object: "minecraft:disk_clay"; Not a JSON object: "minecraft:disk_sand"; Not a JSON object: "minecraft:prototype_underwater_magma"; Not a JSON object: "minecraft:prototype_ore_copper"; Not a JSON object: "minecraft:prototype_ore_lapis_buried"; Not a JSON object: "minecraft:prototype_ore_lapis"; Not a JSON object: "minecraft:prototype_ore_diamond_large"; Not a JSON object: "minecraft:prototype_ore_diamond"; Not a JSON object: "minecraft:prototype_ore_redstone_lower"; Not a JSON object: "minecraft:prototype_ore_redstone"; Not a JSON object: "minecraft:prototype_ore_gold"; Not a JSON object: "minecraft:prototype_ore_iron_small"; Not a JSON object: "minecraft:prototype_ore_iron_middle"; Not a JSON object: "minecraft:prototype_ore_iron_upper"; Not a JSON object: "minecraft:prototype_ore_coal_lower"; Not a JSON object: "minecraft:prototype_ore_coal_upper"; Not a JSON object: "minecraft:prototype_ore_tuff"; Not a JSON object: "minecraft:prototype_ore_andesite"; Not a JSON object: "minecraft:prototype_ore_diorite"; Not a JSON object: "minecraft:prototype_ore_granite"; Not a JSON object: "minecraft:prototype_ore_gravel"; Not a JSON object: "minecraft:prototype_ore_dirt"