Answers for "can't resolve '@material-ui/core/alerttitle'"

metarial ui Can't resolve '@mui/material'

// with npm
npm install @material-ui/core

// with yarn
yarn add @material-ui/core

import { Button } from '@material-ui/core'

Module not found: Can't resolve '@material-ui/lab/Alert'

// need to install @material-ui/lab 

yarn add @material-ui/lab