I copied(and edited) oak_planks recipe file, but at the top where it says minecraft:recipe_shapeless, it says to change it. Error is first code, second is my whole recipe.

Value should be one of: "minecraft:empty", "empty", "minecraft:entity", "entity", "minecraft:block", "block", "minecraft:chest", "chest", "minecraft:fishing", "fishing", "minecraft:gift", "gift", "minecraft:advancement_reward", "advancement_reward", "minecraft:barter", "barter", "minecraft:command", "command", "minecraft:selector", "selector", "minecraft:advancement_entity", "advancement_entity", "minecraft:generic", "generic"

 

{
  "type": "minecraft:recipe:crafting_shapeless",
  "group": "planks",
  "ingredients": [
    {
      "tag": "magic:magicmod_customlogs_rowan"
    }
  ],
  "result": {
    "count": 4,
    "item": "magic:planks_rowan"
  }
}

 

Because the type you need to put into the Json file is "minecraft:crafting_shapeless".

It still doesnt seem to be working...

{
  "type": "minecraft:crafting_shapeless",
  "group": "planks",
  "ingredients": [
    {
      "tag": "magic:magicmod_customlogs_rowan"
    }
  ],
  "result": {
    "count": 4,
    "item": "magic:planks_rowan"
  }
}

 

I got it to work, apparently it was the file name.