We have been using 4.5.7 and all templates have been fine. After updating to 4.5.8 the Home templates is running on an error.

Problem seems to be the Extra area on the Home template. Extra area on other templates is still fine.

I've tried the same on the Magnolia Demo Site. Problem seems to be the same - so at least easy to reproduce. After enabling the Extra area on Home template (screen 1) the page rendering runs on an error (screen 2).

How to solve this issue? Is there a reason why Extra area cannot be using on Home template?