Commercial License

Copyright (c) 2020 Material-UI SAS

MUI X Pro (https://mui.com/pricing/) is commercial software. You MUST agree to the
End User License Agreement (EULA: https://mui.com/r/x-license-eula) to be able to
use the software.

This means that you either need to purchase a commercial license at
https://mui.com/r/x-get-license?scope=pro or be eligible for the Evaluation (trial)
licenses detailed at https://mui.com/r/x-license-trial.