Embeded dashboards failing with sameorigin error

Hi.

Today our embeded dashboadrs are failing to load. The error in the console is 

Refused to display 'looker url' in a frame because it set 'X-Frame-Options' to 'sameorigin'.

This started happening today without any code changes on our end. The iframes and the embeded dashboards have been working fine with the current setup for many month. Any ideas as to what might have changed?

0 2 619