I have a multisite network running the Avada theme on a SiteGround Cloud Server. I can get to the "Edit" page for any post or page in the network as the Super Admin, but I can't actually publish or update any pages. When I hit the button to do so, it kicks me out to the "All Posts" page within that site.
I just updated my Avada theme from 4.0.3 to 5.0.6, which included having to run a shortcode migration tool on each site individually. I have support tickets open on this issue with Avada and SiteGround as well.
I installed a new site into the network and activate the 2016 theme and it is also unable to publish changes.
I also tried to disable all the plugins (with the exceptions of two required Avada plugins - Fusion Core and Fusion Builder - and also with the exception of the domain mapping plugin, since that would break all my site urls.). Disabling the remaining plugins via FTP did not help.
I have gone in and enabled support access as well.