Display WordPress Posts Widget down?

Hi,

After updating Jetpack the Display WordPress Posts Widget appears to constantly show “We cannot load blog data at this time.”

Example:
http://harlesden.blogontheblock.com/2014/07/8-visions-depicting-the-future-of-harlesden/

What could be the cause of this? Is it most likely a problem with WP.com?

Thanks

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