If there is an error login bryntum trial:
npm login --registry=https://npm.bryntum.com
Username: user..yourdomain.com
Password: trial
Email: (this IS public) user@yourdomain.com
Make sure to install the dependencies:
# npm
npm install
Start the development server on http://localhost:3000
npm run dev
Uncaught Error: The Bryntum Grid bundle was loaded multiple times by the application.
on pages/grid.vue change BryntumGrid to Grid and save. Then change it back. Error resolved.