/var/www/html/ folder my Neos installation is actually a sub-folder of
I assume that folder above is a web docroot for another domain (or the default)?
If so, not sure this has anything to do with the issue, but this is bad practice - you should not place the whole neos installation into any docroot, because this will lead to any file e.g. in the Configuration folder to be web-accessible, if not very carefully ruled out via additional configuration.
The typical setup is, to have Neos installed anywhere in e.g.
/var/www/Neos, then configure the webserver to make
/var/www/Neos/Web the docroot for this Neos website, for example via VirtualHost configuration in Apache.
CustomLog "logs/foo.acme.com-access.log" common
It could be, that the web server configuration of the underlying docroot now catches the