Drupal 8.x

I want to add a user field on a content type, which is quite simple. But I get the username and I want the real Name. Also it should be possible to add several users, comma separated shown. Does anybody have a hint?

Hello,

When I paste any url from my website in facebook, I like the logo to display as preview. But I see a different image from the site is being displayed in facebook preview. 

Installed Meta Tags and Token. 

Global configuration of meta tags, I added the tokens under open graph: title, image url, description. 

When I view the mark up, I see this every page:

I have one content type (article) and that content type has multiple taxonomy terms to differentiate content, so I have only articles, then i tag each one as News, About, Artists and more.

I want to create a view which shows just the one single newest post for each taxonomy term. So if I have 5 tax terms, I want to display 5 posts, the newest of each tax term.

I see that I can do the 5 newest posts for the article content type, but not how to make it one of each tax term.

I'm trying to change Bootstrap colors, but it doesn't work. Here is the error message :

I have created a view to list all of one content type. On the view I would like to insert filters that would select only content of a certain year and a certain month or a certain Author. 

I installed the Twig Tweak module on my site to render Views on the home page.

I want to make the display mode frontpage_tasks for the current user, his account, his stores and his groups.

{{ drupal_entity('user', user.id, 'frontpage_tasks') }}
{{ drupal_view('accueil_page_liste_des_taches_boutique', 'block_1') }}
{{ drupal_view('accueil_page_liste_des_taches_groupe', 'block_1') }}

Here is one of my Views :