Drupal 8.x

I'm rebuilding a D7 module which allows my customer to build a secondary menu that changes depending on a node attribute. I've used the Menu API to dynamically create a custom menu. Using those custom menus, I've created MenuLinkContent successfully that are attached to them, but they don't appear on the page in the SecondaryMenuBlock I've assigned to the page. 

FYI I think the culprit might be a module named metatag:view.

Hi, I am running a page at https://www.hopartscenter.org/in-the-gallery/current-exhibition, but the space between objects is too large. Specifically, I want to reduce the space after the content separator (the large horizontal line). How would I go about doing this? Would I have to edit the CSS and how?

Thanks

Hello together, I have a problem creating a new blog. On my Drupal website I want to have one site, where I show some videos. This site's name is e.g. movies. On this site I want to post articles with different movies in form of blog entries. One entry for one movie. When I create a blog entry, I have one site with that movie. I have the option to create the next blog entry. When I create one new entry and set the URL on the same name (movies) like the other entry, Drupal says there is already an entry with that name. How can I manage that, so that one entry is above the other.