CoreUI React is a free React admin template based on Bootstrap 5
In version 4.2 we updated "react-scripts" to 5.0.0 and "react-router-dom" to 6.2.1
Please check also React Router 6 migration guide https://reactrouter.com/docs/en/v6/upgrading/v5
activeClassName: 'active',
from NavLink, because React Router Dom 6 doesn't support itactiveClassName: 'active',
from NavLink, because React Router Dom 6 doesn't support it