Hello,

As we can see from your screenshot, you have PHP errors in the child theme, not in our 2.0 update. And it means that you modified our theme’s code in your child theme and it is no more compatible with our theme. So you just need to remove your modifications from the child theme to prevent these errors.

As for the footer and sidebar, you need to go to Appearance -> Widgets and be sure that all widgets are added to appropriate widgets areas.

Regards