Installing Drupal

Hello!
My apache server crashes with segfault on some pages of drupal 8 (admin/people for example) or when trying to install it (on page 'core/install.php') if Zend Guard Loader is enabled.

I'm trying to install Drupal 8 on my laptop (localhost wamp server), and I always get the following error in the first steps:

Requirements problem

The translation server is offline.

I have a website that utilizes a space in a server that is run by a friend. My website's domain points to that space, and the website itself is fine. However, I tried to put Drupal in a subdirectory of that site and, when I navigated to that directory in the browser, I got "page not found".

I wondered if Drupal had to be in the root directory, so I tossed all of my website stuff in a backup folder and extracted Drupal right into the root directory for my site. I still got "Page Not Found".

Hello,
I have a website in drupal which is running smoothly . but as needed to install another site on the same server , I had to set up the virtualhost in Apache .
Now the drupal site can not access the back office , even entering the credentials does not return error or access .....

Someone who can help ?

Thank you

Max

I plan on maintaining 3 sites originally as developer/themer. These are fairly basic sites (2 are for family businesses) that I plan on improving as needed based on me learning Drupal better.

I kind of like to write code locally, to test it out, and then move it into production as needed.

It seems there are multiple ways to set up my local environment for developing multiple sites but I'm not sure what the best way is.

I am using drush site-install to create the drupal installation. At first it was throwing the below errors when I pre-created the database and users, so then I decided to let drush do it on it's own. Even when drush creates the database, I get the below error:

drush site-install --db-url='mysql://root/password@127.0.0.1/database' --account-name=admin --account-pass=password