Hi there,
I checked and it’s edited outside cornerstone, I’m not saying you did it and I’m not sure how it happens. The edit status is only changeable through code and database.
And it’s blank since the content is not there anymore (deleted), the builder works just okay (try adding an element and it will work).
I recommend restoring your site to the previous date when it still works. And the issue in mobile phone is because of this as That mentioned.
There are section and elements where it’s set hidden, what you edited is the desktop part of you site, you should edit the mobile elements too. You can change your builder device preview to mobile by clicking the mobile icon (just below the JS icon on the left vertical utility bar). Then switch to different devices and you’ll see elements that are meant for that device. You can either update them or delete them, or simply turn off the HIDE BASED ON SCREEN WIDTH options.
Thanks!