Thank you!!!!! The 113 PHP 7.4 patch restores the Add-ons and Access menus and solves the Twig issue.
However, I am still having issues with saving files
". . . . Also, pages and settings do not save. I can eventually get settings or a page to save. So, there is a weird problem with permissions."
This is weird it is inconsistent, meaning that if I press save, eventually the same page will save.
This occurs both on a fresh install and upgrading sites.
Is there a permissions utility for WB that can run a site-wide permissions check of files and folder? Or is this something else?