Steps to reproduce

1. Download the demo from https://hd.magnolia-cms.com/docs/getting-started/hello-spa 
2. Use react demo to build and deploy the "built" into webresources of the light modules. 
3. Create a page using the spa template (react) 
4. Open that page inside the Page Editor
5. It will show a blank page.

.. Logs, screens hots, gifs...

Expected results

.. Justify on-trivial expectations with a link to a doc or a relevant discussion.

Actual results

Workaround

Development notes