import LicenseInfo from '@mui/x-data-grid-premium'; LicenseInfo.setLicenseKey(process.env.REACT_APP_MUI_LICENSE_KEY || '');
If you're seeing a error in MUI X (Data Grid, Date Pickers, Charts, Tree View, etc.), it means you’re using a premium MUI X component without a proper commercial license. mui x missing license key remove
Then in .env :
⚠️ if you actually use premium features. 2. Using MUI X Pro or Premium (with a valid license) ✅ Add your license key correctly: import LicenseInfo from '@mui/x-data-grid-pro'; LicenseInfo.setLicenseKey('your-license-key-here'); import LicenseInfo from '@mui/x-data-grid-premium'