Fix yarn version to use 2.4.2, otherwise yarn v3 will be used.

.github/workflows/behat.yml

@@ -61,7 +61,7 @@ jobs:
             - name: Install Yarn
               run: |
                   sudo npm install -g yarn
-                  yarn set version berry
+                  yarn set version 2.4.2
                   yarn --version
 
             - name: Get yarn cache directory

.yarnrc.yml

@@ -4,4 +4,4 @@ plugins:
   - path: .yarn/plugins/@yarnpkg/plugin-interactive-tools.cjs
     spec: "@yarnpkg/plugin-interactive-tools"
 
-yarnPath: ".yarn/releases/yarn-berry.cjs"
+yarnPath: .yarn/releases/yarn-2.4.2.cjs

README.md

@@ -39,7 +39,7 @@ git clone https://github.com/chamilo/chamilo-lms.git chamilo2
 cd chamilo2
 composer install
 
-yarn set version berry
+yarn set version 2.4.2
 yarn install
 yarn run encore dev
 chmod -R 777 .

package.json

@@ -149,5 +149,6 @@
     "vue-cli-plugin-quasar": "next",
     "webpack-notifier": "^1.13.0"
   },
-  "license": "GPL-3.0"
+  "license": "GPL-3.0",
+  "packageManager": "yarn@2.4.2"
 }