After update to EA4, permissions error

We finally updated our last server to EA4. We had SuPHP as the php handler installed, and it migrated seemingly properly. It went smoothly, but we have one website that is having issues. Customer doesn't use any php on the site. The main page loads nicely, but most links result in: Forbidden You don't have permission to access /library.html on this server. Additionally, a 403 Forbidden error was encountered while trying to use an ErrorDocument to handle the request.
perms on public_html are 750, subdirectories are 755, files are 644. File ownerships are user:user and directory owns are user:nobody. When using EA3, we had used fileprotect, which isn't in EA4. However, found this: