[Vuejs]-Cant install element ui on vue project

element-ui has peer dependency vue@"^2.5.17" and you seem to have a requirement at the root of your project with vue@"^3.2.29" .

Maybe just try to modify your package.json to fix the conflict with:

{
  "dependencies": {
    "element-ui": "^2.15.6",
    "vue":"^2.5.17"
    // ...

  }
}