Mui X Missing License Key Remove 🎉 📍

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.

REACT_APP_MUI_LICENSE_KEY=demo ⚠️ This only works in . In production, the watermark will appear unless you have a valid license. 4. Remove MUI X Premium Components Entirely If you don't want to pay for a license: Downgrade to the free version ( @mui/x-data-grid instead of -pro or -premium ): npm uninstall @mui/x-data-grid-pro @mui/x-data-grid-premium npm install @mui/x-data-grid Then replace imports: mui x missing license key remove

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

import LicenseInfo from '@mui/x-data-grid-premium'; // or pro // Disable license warning (only if you're 100% sure you're using free features only) LicenseInfo.setLicenseKey(''); Remove the Watermark Without a License (Trial/Dev only)

Place this (e.g., in index.js or App.js ). 3. Remove the Watermark Without a License (Trial/Dev only) If you're just developing locally and want to hide the watermark temporarily: