A few days ago I was able to edit posts with Cornerstone, but am no longer able to. See how in the first image there is no tab for Cornerstone, only 'visual' and 'text.'
See in the second image how editing pages in Cornerstone is possible. The tab is there.
I have cleared my cache in browser (Chrome) and Wordpress. I have also made sure my Cornerstone plugin is updated and so is X.
I'd appreciate any help! Links and logins in the secure note!