Drupal 8.x

In Drupal 7, there a class e.g "path-node-17" added to the body tag so that we can target a particular node easily but this is missing in Drupal 8, I wonder how to get this node id class output in the tag in Drupal 8.

I installed the latest version of poll module.
My website is here:
http://drupal.clivio.pl/
When somebody votes (registered or not registered) vote count doesn't work.
Module is placed on the top of the right sidebar.
Only total vote count is visible in the admin panel.
I'm new to drupal, but the matter is pretty urgent and before I will be able to fix it myself, a couple of weeks will pass at least.
I will be very grateful for help.

I am working on a new charity website. It’s something I can do myself given time, but because we are a small charity my time is limited so I am seeking someone to help me by creating the front page layout and framework and 2/3 of the content page types of the website to get me started. I would be seeking someone to work with me to create something based of a specific look and feel I have seen on a few other charity websites.

The site would be need to be:

I installed Drupal with no problems, but when I select anything on the admin menu I get an error. File not found /admin/content.
Instead of /mysite/admin it goes starts from root.

When I tried to upgrade with drush, I get the error: syntax error, unexpected T_STRING, expecting T_CONSTANT_ENCAPSED_STRING or '(' in /home/digitaldrz/education-21.org/core/includes/bootstrap.inc on line 7

i have installed the Events module...its great...although have a minor issue i just cant resolve

when altering the event.css i managed to change all the necessary colors other than the purple shaded cell that denotes the first day of the month in the calendar

i have tried altering 'event-calendar td.selected' but this doesnt change it...is it hard coded somewhere?

using Moodle developer toolbar, when i hover over the cell, the latter part of the path is (if the date is Tues, May 1):

>td # may1.may tue selected > div.event-empty

I have installed and enabled the Panels Module on my Pantheon Dev 8.1 site. After installation and enabling there is no sign of Panels on my website. Nothing to Configure. No Panels on the Add Content Page. No Panels anywhere in Structure.

Here is the message I got when did my Drush Install and enable of Panels: