Can't change VS Code Settings: problem with Json file - json

Question

When ever I try to change a setting in VS Code it shows an error saying "unable to write into user settings".
When I open the JSON file in VS Code it shows there is an error but I cannot seem to find it since I have no idea how JSON works.... Below is all the code in my settings file:
{
"window.zoomLevel": -1,
"editor.fontSize": 26,
"editor.tabSize": 1,
"files.autoSave": "off",
"editor.wordWrap": "on",
"editor.formatOnPaste": true,
"editor.formatOnSave": true,
}
"highlight-matching-tag.styles": {
"opening": {
"left": {
"custom": {
"borderWidth": "0 0 0 5px",
"borderStyle": "Solid",
"borderColor": "Yellow",
"borderRadius": "5px",
"overviewRulerColor": "white"
}
},
"right": {
"custom": {
"borderWidth": "0 5px 0 0",
"borderStyle": "Solid",
"borderColor": "Yellow",
"borderRadius": "5px",
"overviewRulerColor": "white"
}
}
}
}
"prettier.singleQuote": true
EDIT: I managed to solve it when I realised that JSON are just stringified JS objects and that VS code only allows single object JSON (not sure if multiple object JSON is even a thing). Basically I neded to move everything into the first {} which is where the official VS code settings are stored (i.e the ones outside were put there by the plugins for some reason).

Answer 1

I also do not know much about JSON. But I know there are online validators like this one: https://jsonlint.com/.
In the line "editor.formatOnSave": true, remove the ,. It could also be the case that VS Code does not like multiple root elements in its JSON - for that you could try to add { as the first and } as the last character of the file (no guarantee).

Answer 2

The settings.json file is 1 dictionary of keys
{
"window.zoomLevel": -1,
"editor.fontSize": 26,
"editor.tabSize": 1,
"files.autoSave": "off",
"editor.wordWrap": "on",
"editor.formatOnPaste": true,
"editor.formatOnSave": true,
"highlight-matching-tag.styles": {
"opening": {
"left": {
"custom": {
"borderWidth": "0 0 0 5px",
"borderStyle": "Solid",
"borderColor": "Yellow",
"borderRadius": "5px",
"overviewRulerColor": "white"
}
},
"right": {
"custom": {
"borderWidth": "0 5px 0 0",
"borderStyle": "Solid",
"borderColor": "Yellow",
"borderRadius": "5px",
"overviewRulerColor": "white"
}
}
}
},
"prettier.singleQuote": true
}