Added .region file, doesn't show in Page Layout on Squarespace UI

I have a few .region files so far on my unpublished website. I just added another .region file with a "Hello World" in HTML. Then I added the file to my template.conf like I did with my other .region files, expecting it to show on the squarespace UI when going to Pages > Settings > Advanced > Page Layout > [Newly_added].region file, but it's not there.

Here is the syntax on my template.conf file. The .region file that's not showing is the javascript.region and test.region. Is there a limit to how many .region files you can have on a trial or something?

{
  "name" : "unnamed project",
  "author" : "Squarespace",
  "navigations" : [
  {
    "title" : "Main Navigation",
    "name" : "mainNav"
  }],

  "layouts" : {
    "default" : {
      "name" : "",
      "regions" : [ "site" ]
    },
    "home" : {
      "name" : "Home page",
      "regions" : [ "home" ]
    },
    "frontend" : {
      "name" : "Frontend page",
      "regions" : [ "frontend" ]
    },
    "javascript" : {
      "name" : "JavaScript page",
      "regions" : [ "javascript" ]
  },
  "test" : {
    "name" : "Test page",
    "regions" : [ "test" ]
  },
},
  "stylesheets": [
    "base.less",
    "nav.less",
  ]
}

There was a JSON error in there somewhere. I copy + pasted my template.conf file into a json syntax linter online to fix it