addTheme doesn't seem to work

I am trying to use the API Editor.addTheme but I can't get the API to work.

function addDefaultTheme() {
  const success = Editor.addTheme(masterTheme, 'themeChooseMasterTheme.json')
  logDebug(pluginJson, `addDefaultTheme saving theme success: ${String(success)}`)
}

I get:

Failed to add theme, error = invalidJSON
2022-11-24 09:18:22 | DEBUG | ../plugin.json :: addDefaultTheme saving theme success: false

When I run the JSON through jsonlint.com it shows as valid
So why can't I save it?
Here's the JSON I'm trying to save:

{
  "docs": "https://help.noteplan.co/article/44-customize-themes",
  "name": "ThemeChooserMasterTheme",
  "style": "Light",
  "author": {
    "name": "Panda",
    "email": "hello@noteplan.co"
  },
  "editor": {
    "backgroundColor": "#ffffff",
    "backgroundColor_info": {
      "description": "Background color of the editor",
      "type": "color",
      "example": "Any text should demonstrate the color behind it"
    },
    "altBackgrounfdColor": "#FAFFFF",
    "tintColor": "#aaaaaa",
    "tintColor2": "#DD4C4F",
    "textColor": "#333333",
    "toolbarBackgroundColor": "#F3F5F7",
    "toolbarIconColor": "#dd4c4f",
    "menuItemColor": "#dd4c4f",
    "shouldOverwriteFont": false,
    "shouldOverwriteFont_info": {
      "description": "Preference settings should overwrite the font of the editor. Yes by default, Select No if you want the font in your theme file to be used regardless of what the preferences say.",
      "type": "boolean",
      "example": "Any text should demonstrate the text being overriden"
    },
    "timeBlockColor": "#d87001"
  },
  "styles": {
    "body": {
      "description": "Body text: font, size and color",
      "font": "AvenirNext-Regular",
      "size": 16,
      "color": "#444444"
    },
    "title1": {
      "font": "AvenirNext-DemiBold",
      "color": "#000000",
      "size": 28
    },
    "title2": {
      "font": "AvenirNext-DemiBold",
      "color": "#000000",
      "size": 24
    },
    "title3": {
      "font": "AvenirNext-DemiBold",
      "color": "#000000",
      "size": 20
    },
    "title4": {
      "regex": "^\\h*(####+ )(.*)",
      "matchPosition": 2,
      "isRevealOnCursorRange": true,
      "color": "#F0A759",
      "size": 18,
      "underlineStyle": 1
    },
    "title-mark1": {
      "color": "#40000000",
      "size": 28,
      "font": "AvenirNext-DemiBold"
    },
    "title-mark2": {
      "color": "#40000000",
      "size": 24,
      "font": "AvenirNext-DemiBold"
    },
    "title-mark3": {
      "color": "#40000000",
      "size": 20,
      "font": "AvenirNext-DemiBold"
    },
    "bold": {
      "font": "AvenirNext-DemiBold",
      "size": 16
    },
    "bold-left-mark": {
      "color": "#40000000"
    },
    "bold-right-mark": {
      "color": "#40000000"
    },
    "italic": {
      "font": "AvenirNext-Italic",
      "size": 16
    },
    "italic-left-mark": {
      "color": "#40000000"
    },
    "italic-right-mark": {
      "color": "#40000000"
    },
    "boldItalic": {
      "font": "AvenirNext-BoldItalic",
      "size": 16
    },
    "boldItalic-left-mark": {
      "color": "#40000000"
    },
    "boldItalic-right-mark": {
      "color": "#40000000"
    },
    "code": {
      "font": "Menlo-Regular",
      "backgroundColor": "#F3F5F7",
      "size": 15
    },
    "code-left-backtick": {
      "color": "#009155"
    },
    "code-right-backtick": {
      "color": "#009155"
    },
    "checked": {
      "regex": "(^\\h*[\\*\\-]{1} |^\\h*[0-9]+[\\.\\)] )(\\[x\\] )(.*)",
      "color": "#ddd00",
      "matchPosition": 0,
      "headIndent": 33
    },
    "todo": {
      "font": "noteplanstate",
      "color": "#DD4C4F",
      "headIndent": 33,
      "size": 16
    },
    "checked-todo-characters": {
      "font": "noteplanstate",
      "headIndent": 33,
      "color": "#DD97B863",
      "size": 16
    },
    "special-char": {
      "font": "Menlo-Regular"
    },
    "tabbed": {
      "headIndent": 43
    },
    "quote-mark": {
      "color": "#e7eaec",
      "font": "noteplanstate",
      "headIndent": 50,
      "size": 25,
      "paragraphSpacing": 0,
      "paragraphSpacingBefore": 0,
      "lineSpacing": -3
    },
    "quote-content": {
      "color": "#333333",
      "type": "italic",
      "headIndent": 33
    },
    "link": {},
    "schedule-to-date-link": {},
    "done-date": {},
    "schedule-from-date-link": {},
    "hashtag": {
      "type": "",
      "COMMENT": "Disabled link by setting hashtag to empty string"
    },
    "attag": {
      "type": "",
      "COMMENT": "Disabled link by setting hashtag to empty string"
    },
    "phonenumber": {},
    "highlighted": {
      "regex": "(==)([^\\s].+)(==)",
      "backgroundColor": "#55D2D21B",
      "order": 35,
      "matchPosition": 2,
      "isRevealOnCursorRange": true
    },
    "highlighted-left-colon": {
      "regex": "(==)([^\\s].+)(==)",
      "color": "#AA45A2E5",
      "backgroundColor": "#7745A2E5",
      "isMarkdownCharacter": true,
      "isHiddenWithoutCursor": true,
      "isRevealOnCursorRange": true,
      "matchPosition": 1
    },
    "highlighted-right-colon": {
      "regex": "(==)([^\\s].+)(==)",
      "color": "#AA45A2E5",
      "backgroundColor": "#7745A2E5",
      "isMarkdownCharacter": true,
      "isHiddenWithoutCursor": true,
      "isRevealOnCursorRange": true,
      "matchPosition": 3
    },
    "strikethrough": {
      "regex": "(~~)([^~]{1,})(~~)",
      "matchPosition": 2,
      "strikethroughStyle": 1,
      "color": "#888888",
      "isRevealOnCursorRange": true
    },
    "strikethrough-left-tilde": {
      "regex": "(~~)([^~]{1,})(~~)",
      "matchPosition": 1,
      "isMarkdownCharacter": true,
      "isHiddenWithoutCursor": true,
      "color": "#d9d9d9",
      "isRevealOnCursorRange": true
    },
    "strikethrough-right-tilde": {
      "regex": "(~~)([^~]{1,})(~~)",
      "matchPosition": 3,
      "isMarkdownCharacter": true,
      "color": "#d9d9d9",
      "isHiddenWithoutCursor": true,
      "isRevealOnCursorRange": true
    },
    "checked-override": {
      "regex": "(^\\h*[\\*\\-]{1} |^\\h*[0-9]+[\\.\\)] )(\\[x\\] )(.*)",
      "matchPosition": 0,
      "backgroundColor": "#FFE5E5",
      "color": "#CDC6C5",
      "headIndent": 33,
      "strikethroughStyle": 1
    },

    "checked-canceled": {
      "regex": "(^\\h*[\\*\\-]{1} |^\\h*[0-9]+[\\.\\)] )(\\[\\-\\] )(.*)",
      "matchPosition": 0,

      "color": "#CDC6C5",
      "headIndent": 33,
      "strikethroughStyle": 1
    },

    "checked-scheduled": {
      "regex": "(^\\h*[\\*\\-]{1} |^\\h*[0-9]+[\\.\\)] )(\\[\\>\\] )(.*)",
      "matchPosition": 0,

      "color": "#cccccc",
      "headIndent": 33
    },
    "Templates_tags_old": {
      "regex": "(?>\\{\\{)[^)]{1,}((?>\\(\\)\\}\\})|(?>\\)\\}\\}))",
      "matchPosition": 0,
      "color": "#8FBCBB",
      "font": "Menlo-Regular",
      "isHiddenWithoutCursor": false,
      "isRevealOnCursorRange": true
    },
    "Templates_tags-opener": {
      "regex": "(<%[\\-=_~]?\\s+)(.*?)(\\s+[\\-]?%>)",
      "matchPosition": 1,
      "color": "#883B3AB2",
      "font": "Menlo-Regular"
    },
    "Templates_tags": {
      "regex": "(<%[\\-=_~]?\\s+)(.*?)(\\s+[\\-]?%>)",
      "matchPosition": 2,
      "color": "#cccccc",
      "font": "Menlo-Regular"
    },
    "Templates_tags-closer": {
      "regex": "(<%[\\-=_~]?\\s+)(.*?)(\\s+[\\-]?%>)",
      "matchPosition": 3,
      "color": "#883B3AB2",
      "font": "Menlo-Regular"
    },
    "Templates_tags-commented-out": {
      "regex": "(<%#\\s+.*?\\s+[\\-]?%>)",
      "matchPosition": 1,
      "color": "#3B3AB288",
      "font": "AvenirNext-Italic"
    },
    "priority-any-number-of-!-flagged": {
      "regex": "(^[\\h\\v]*[\\*|-] (\\[ \\] )?)(.*!{1,}.*[\\h\\v])",
      "matchPosition": 3,
      "backgroundColor": "#FFE5E5",
      "headIndent": 33
    },
    "Timeblock-HideTag-withID": {
      "color": "#8FBCBB",
      "regex": "\\s#🕑-\\d*",
      "matchPosition": 0,
      "type": "nolink",
      "isHiddenWithoutCursor": true,
      "isRevealOnCursorRange": true
    },
    "Timeblock-HideTag": {
      "color": "#8FBCBB",
      "regex": "\\s#🕑",
      "matchPosition": 0,
      "type": "nolink",
      "isHiddenWithoutCursor": true,
      "isRevealOnCursorRange": true
    },
    "timeblocks": {
      "regex": "(?:^\\s*(?:\\*(?!\\s+\\[[\\-\\>]\\])\\s+|\\-(?!\\h+\\[[\\-\\>]\\]\\s+)|[\\d+]\\.|\\#{1,5}\\s+))(?:\\[\\s\\]\\s+)?.*?\\s(((at|from)\\s+([0-2]?\\d|noon|midnight)(:[0-5]\\d)?(\\s?(AM|am|PM|pm)?)(\\s*(\\-|\\–|\\~|\\〜|to)\\s*([0-2]?\\d)(:[0-5]\\d)?(\\s*(AM|am|PM|pm)?))?|([0-2]?\\d|noon|midnight)(:[0-5]\\d)\\s*(AM|am|PM|pm)?(\\s*(\\-|\\–|\\~|\\〜|to)\\s*([0-2]?\\d|noon|midnight)(:[0-5]\\d)?(\\s*(AM|am|PM|pm)?)?)?))(?=\\s|$)",
      "matchPosition": 1,
      "color": "#8FBCBB"
    },
    "arrow-link": {
      "regex": ">(([^<]+(?=<))|[\\S]+)",
      "matchPosition": 1,
      "urlPosition": 1,
      "isRevealOnCursorRange": true,
      "type": "noteLink",
      "prefix": "noteplan://x-callback-url/openNote?noteTitle="
    },
    "arrow-left-delimiter": {
      "regex": "(>)([^<]+)(<)",
      "matchPosition": 1,
      "isMarkdownCharacter": true,
      "isHiddenWithoutCursor": true,
      "isRevealOnCursorRange": true
    },
    "arrow-right-delimiter": {
      "regex": "(>)([^<]+)(<)",
      "matchPosition": 3,
      "isMarkdownCharacter": true,
      "isHiddenWithoutCursor": true,
      "isRevealOnCursorRange": true
    },
    "note-title-link": {
      "regex": "(?<!`)(\\[{2})(.*?\\]*)(\\]{2})(?!`)",
      "color": "#5E81AC",
      "font": "AvenirNext-DemiBold",
      "underlineStyle": 1
    },
    "note-title-link-left": {
      "regex": "(?<!`)(\\[{2})(.*?\\]*)(\\]{2})(?!`)",
      "matchPosition": 1,
      "color": "#ECEFF4",
      "isHiddenWithoutCursor": true,
      "isRevealOnCursorRange": true
    },
    "note-title-link-right": {
      "regex": "(?<!`)(\\[{2})(.*?\\]*)(\\]{2})(?!`)",
      "matchPosition": 3,
      "color": "#ECEFF4",
      "isHiddenWithoutCursor": true,
      "isRevealOnCursorRange": true
    },
    "comment": {
        "SOURCE": "https://discord.com/channels/763107030223290449/963950027946999828/1003529048032555059",
        "regex": "(%%)([^:]{1,})(%%)",
        "matchPosition": 2,
        "isRevealOnCursorRange": true,
        "isHiddenWithoutCursor": true,
        "color": "#888888"
    },
    "comment-left-colon": {
        "regex": "(%%)([^:]{1,})(%%)",
        "matchPosition": 1,
        "isMarkdownCharacter": true,
        "color": "#88818475"
    },
    "comment-right-colon": {
        "regex": "(%%)([^:]{1,})(%%)",
        "matchPosition": 3,
        "isMarkdownCharacter": true,
        "isHiddenWithoutCursor": true,
        "isRevealOnCursorRange": true,
        "color": "#88818475"
    }
  }
}