I have message: manifest.json is invalid. Please correct it and try uploading again. The parser reported: {} is not of type 'string

My manifest.json

{
  "manifest_version": 3,
  "name": "Extention",
  "description": "Extention",
  "version": "0.0.1",
  "content_scripts": [
      {
        "matches": [
          "https://*/*",
          "http://*/*"
        ],
        "js": ["content_script.js"],
        "run_at": "document_idle"
      }
    ],
    "content_security_policy": {
    },
    "background": {
        "service_worker": "background.js"
    },
    "action": {
      "default_title": "Extention",
      "default_popup": "popup-signIn.html"
    },
    "icons": {
      "16": "icon16.png",
      "32": "icon32.png",
      "48": "icon48.png",
      "128": "icon128.png"
    },
    "permissions": [
      "storage",
      "contextMenus",
      "notifications",
      "tabs"
    ],
    "host_permissions": [
      "https://google.com/",
      "*://*/*"
    ]
}

What I need to do? Thanks for answer)