I'm getting this error from the log
[22:55:24] [main/INFO]: [hellfirepvp.modularmachinery.common.crafting.RecipeRegistry:loadRecipes:92]: com.google.gson.JsonSyntaxException: com.google.gson.stream.MalformedJsonException: Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 1 path $

What did I do wrong.

Exactly what it says: your JSON is malformed/invalid.

Use JSON-validators or related to validate if you have problems defining your JSON files properly.

I've used two .json validators, and both say my file is valid, here is the file.
https://pastebin.com/FhuwczyB Found it, it was a typo