React-Bootstrap is compatible with various versions of Bootstrap. As such, you need to ensure you are using the correct combination of versions. See the below table on which version of React-Bootstrap ...

React 18, a major upgrade to the popular JavaScript library, is now available as a production release, highlighted by a new concurrent renderer and automatic batching of updates.

The React versions are updated in dependencies of package.json: If you install a brand new Create React App, the React versions automatically point to React 18, although the changes of createRoot are ...