My main site is on X 4.6.4 and Cornerstone 4.2.3 and I only get the pulsing logo on the edit page.
I have cleared plugin cache and browser cache and it did not help.
I have also increased the PHP memory limit to 512M.
I figured it might be an issue due to my old version of X so i updated my staging site to X 7.2.3 and Cornerstone 4.2.3.
No changes
I will send my login info in a secure message.
Thank you!