Hello,
I waited to update X Theme and Cornerstone up to date from version 6.0.4 and 3.0.4
Today I recently installed https://pdpkapp.com the latest version 6.3.8 and 3.3.8
After updating, Customize is always loading and does not open, while Cornerstone does not open.
I have cleaned the cache both from the Server and from the WordPress Dashboard.
Unfortunately nothing has improved.
Do you have any advice please to try before going back to the previous versions?
Best regard,
Mauro