SublimePrettyJson: Not working on ST4

Getting error Expecting value: line 1 column 1 (char 0) when trying to prettify JSON files. These files work fine with python’s json module and with this package on ST3. I installed directly from this repo today to double check and had the same problem.

Example of JSON (pulled from the web) that didn’t work with me as described above:

{
  "cells": [
    {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
        "# Trainer notes",
        "\n",
        "Copyright"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "toc": true
      },
      "source": [
        "<h1>Table of Contents<span class=\"tocSkip\"></span></h1>\n",
        "<div class=\"toc\"><ul class=\"toc-item\"><li><span></span></div>"
      ]
    }
  ]
}