Error — Cannot serve directory — using composer

Error — Cannot serve directory — using composer “drupal-project”, did i mess scaffolding up, or something more basic?

Can someone point me in right direction for use of Composer creating a multi-site configuration? I’m using the composer project : “drupal-composer/drupal-project”.

I’m not sure if I’ve messed up the scaffolding setup or overlooked something else more trivial. Have spent 8-10 hours googling similar threads and trying to figure it out without success. Can someone point me in right direction?

Configured s/w is: Ubuntu 16.04/Apache 2.4.18/MariaDB 15.1 (10.0.28-MariaDB)/PHP7.0.8ubuntu0.16.04.3.

— Screenshot of folder structure is at
— composer.json is at
— My sites.php has an entry for (‘’ => ‘’,)

– This is a recently built Ubuntu server, that currently hosts a single (not multi-site) instance that works fine.
– is installed in the multi-site vicinity (/drupalsb/web/sites/ and is the site I’m trying to install. When I try to hit that address with browser, I get the following error

[Thu Dec 08 20:20:55.062396 2016] [autoindex:error] [pid 3663] [client] AH01276: Cannot serve directory /var/www/drupalsb/web/sites/ No matching DirectoryIndex (index.html,index.cgi,,index.php,index.xhtml,index.htm) found, and server-generated directory index forbidden by Options directive

– On same URL above, If I put a simple index.html with content in the destination folder (ie.,, that renders fine (so I think the Apache vhosts and permissions are ok).
– The settings.php is enabled for write in this folder

This is a recent server rebuild — I’m able to get a “standalone” installation of drupal to work fine — Which makes me think other Drupal dependencies are in place.

I am stumped. TIA for any suggestions

Drupal version: