Thanks for letting me know.
I will try importing litjson and see what is going wrong, even though I already have some suspicions.
By the way, you don’t have to add all the types that litjson comes with to work with litjson. I have’t yet used LitJson, but I presume that only adding the main static type of the library (the one that has the Serialize and Deseralize for example) will suffice to work with it instead of adding all the types that are included in the library.