I updated my site to Joomla 3.10 and found that the s5_flex_menu was not displaying. I thought that a Vertex update might be required (it says in the documentation that Vertex can be updated at any time). After the update I got a missing XML file error and site dead. I backed out that Vertex update, purchased a new Shape5 subscription, downloaded the Shape5 Corpway template (not the one for Joomla 4) and updated. I assume that this Corpway template update also includes Vertex updates?
This caused the issues in the screenshot attached.
As this is a live site, I have had to back out this update too.
Please advise me what I need to do to get the site updated and working properly.