I had tried with WP Rocket deactivated. When that didn't work, I cleared its cache and deleted the plugin. Originally, the problem was that Cornerstone would not load in Chrome but would in Firefox. After upgrading to the newest release of WordPress, it now no longer loads in both Chrome and Firefox.
I'm looking at the settings and just noticed that there's nothing showing in Custom Path (other than the holder X where the path would be typed in). What, if anything, should be in Custom Path?
I'm currently running 4.0.4