Hello,
I have exact this problem too, but could not solve it
https://github.com/vaadin/vaadin.com/issues/44
I have the problem with “start project (bakery)” since version 10.0.6
Means 10.0.6 worked fine but all other version 10.0.7/10.0.8/10.0.9 not worked anymore
It only worked with chrome and opera with other browser edge and firefox(LTS v52) the screen is white in browser.
With new Firefox Version 63.03 it worked
Any suggestion for the other both?
greetings
Artur