Hello folks,

Currently, Drupal is using jQuery 3.2.1. But I need to downgrade it to 2.2.4. So I have followed the guidelines from here and from Drupal answers here. My bartik.info.yml file currently looks like this:

libraries:
  - bartik/global-styling
  - bartik/global-scripts
 libraries-override:
   core/jquery: bartik/jquery-custom

and my bartik.libraries.yml looks like this:

global-styling:
  css:
    theme: 
      css/main.css: {}
global-scripts:
  js:
    js/plugins.js: {}
    js/drupal-main.js: {}
    js/vendor/modernizr-3.3.1.min.js: {}
jquery-custom:
  header: true
  remote: https://github.com/jquery/jquery.js
  version: "2.2.4"
  license:
    name: MIT
    url: https://github.com/jquery/jquery/blob/2.2.4/LICENSE.txt
    gpl-compatible: true
  js:
    js/jquery-2.2.4.min.js: { minified: true, weight: -20 }
  dependencies:
    - core/drupal
    - core/jquery
    - core/jquery.once

However, I keep getting Uncaught ReferenceError: jQuery is not defined. I am not sure where the problem is at this point. Did anyone else face the same issue? If so, how did you solve this?