After deleting the `left` and `right` properties in all my templates, I was able to restore the pages back to their original state. For example: https://fau.cannabisstudiesonline.com
What is more, they were working just fine until about twelve hours ago, when everything suddenly broke. We have over six mission-critical domains based on the same template, generating thousands of dollars of revenue daily. All of them went down simultaneously. My suspicion is that some breaking changes were released on the backend without notice.