Installing Drupal

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.

I'm facing problem on local versions of drupal that i've downloaded through git clone
However, I have two other drupal installations working perfectly(8.0.x via clone and 8.3.x-dev via .tar.gz)
git clone --branch 8.3.x https://git.drupal.org/project/drupal.git drupal83

I've cloned 8.3.x and 8.2.x using the above command and both of them return the same "HTTP ERROR 500".
On checking the apache log it says about some problems in including "autoload.php" as in the following lines

I am very new to Drupal and having to pick it up quickly here at work. I have a problem that I've been stuck on for half a day.

My question is: When you click on a course page and look at the block "at a glance", there are stakeholders at the bottom of that block that were inserted when creating the block. Once a specific stakeholder group in the "at a glance" box section has been tagged, the course should show up on that stakeholders page.2 of my courses are not showing up and 2 of them are.

I just started working on drupal 8.2.4 and setup first drupal 8 project "drupal8_1" in my www folder and it was working fine with url http://localhost/drupal8_1. Then I installed another drupal 8 project "drupal8_2" in www folder.

Hi there

I'm quite in a dilemma regarding an existing site that has to be transferred to a web host apparently providing extremely limited features in the web hosting package.

They only provide FTP-Data & no web-based Control panel and data base login for a database they create for you. No access to Phpmyadmin.

Here is what has been done:

Hi, please I need help: I've chosen for my customers Drupal as well complex complex and flexible websites are required and I do not want to downgrade my decision.
I cannot install on my web Domain Hosting Service (Italy - Tiscali) Drupal v.8.2.3 because a blocking ERROR is raised during Install:

An AJAX HTTP error occurred.
HTTP Result Code: 404
Debugging information follows.
Path : / core/install.php?langcode=en&profile=standard&continue=1&id=1&op=do_nojs&op=do
StatusText: Not Found
ResponseText: No Input file specified