MarkPr on "[Plugin: Jetpack by WordPress.com] Backend (except sidebar menue) becomes grey when activate Jetpack 4.1"

Hi Guys,
I just updated Jetpack and there seems to occur an error in my backend. As soon as I activate Vaultpress, Yoast Premium or Yoast News with Jetpack and link it to my WordPress account, the backend (except the sidebar menu) becomes grey. Website: http://www.btc-echo.de

Any Idea?

https://wordpress.org/plugins/jetpack/

Or when I activate spelling check the Content of the Post editor becomes grey. e.g. Always when I activate a Jetpack function which is used in the backend it becomes grey (except the Sidebar).