[FLOW3-general] TYPO3 Phoenix Sprint Release 1 + Required property 'page' does not exist in source.

[Dmitri Pisarev]

Hello list!

I have made an attempt to try out the new TYPO3 Phoenix Sprint Release 
1. Unpacked on my local XAMPP server and got the following error:
An error occurred while trying to call 
F3\TYPO3\Controller\Frontend\PageController->showAction(). Error: 
Required property 'page' does not exist in source.
Then tried to do the same thing on my production server: same outcome. 
What's up?

Sorry if my question is too stupid.

Regards,
Dmitri.