Chrome Extension Refused to Load because it violates the following Content Security Policy

I am trying to load a Chrome Extension with React, but I keep getting the following error:

Refused to load the script ‘https://code.jquery.com/jquery-3.2.1.slim.min.js’ because it violates the following Content Security Policy directive: “script-src ‘self'”. Note that ‘script-src-elem’ was not explicitly set, so ‘script-src’ is used as a fallback.

Does anyone know how to fix this? Thank you.

Manifest.json

{
  "manifest_version": 3, 
  "name": "Reminder-App",
  "version": "0.1.0",
  "description": "Reminder app for all your tasks",
  "action": {
    "default_popup": "index.html",
    "default_title": "Reminder App"
  },
  "host_permissions": [
    "https://www.google.com/*"
  ]
}

Index.html

 <script
    src="https://code.jquery.com/jquery-3.2.1.slim.min.js"
    integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN"
    crossorigin="anonymous"
  ></script>