Metor + Semantic UI : variable @googleProtocol is undefined

I've created a fresh project with Meteor and I'm trying to integrate Semantic UI, I've walked through the steps here https://semantic-ui.com/introduction/integrations.html but I'm getting this problem after installing the sematicui and postcss packages :

   While processing files with less (for target web.browser):
   client/lib/semantic-ui/definitions/globals/site.import.less:29: variable
   @googleProtocol is undefined
   error: variable @googleProtocol is undefined

The Meteor version is 1.10.2, the packages.json looks like this;

{
  "name": "test",
  "private": true,
  "scripts": {
    "start": "meteor run",
    "test": "meteor test --once --driver-package meteortesting:mocha"
  },
  "dependencies": {
    "@babel/runtime": "^7.8.3",
    "jquery": "^3.4.1",
    "meteor-node-stubs": "^1.0.0"
  },
  "devDependencies": {
    "autoprefixer": "^6.3.1",
    "postcss": "^6.0.22",
    "postcss-load-config": "^1.2.0"
  },
  "postcss": {
    "plugins": {
      "autoprefixer": {
        "browsers": [
          "last 2 versions"
        ]
      }
    }
  }
}