Drupal 8.x

I am still on a localhost devel installation.

I have read at least 30 posts at various places. Many don't work at all. Many are outdated. Many make no sense whatsoever. I have migrate, migrate_plus and migrate_tools installed. I added a migration group but all that enables me to do is to list migrations that do not exist #Frustration.

 I found a couple of commercial solutions but I prefer to do this myself and save some money.

Currently on our Drupal 8 site we have a lot of content that makes use of Layout Builder.  We were wondering if there is a way to add an actions bar in the way that Views Bulk Operations actions dropdown works to our show all blocks view. (Content: Node operations bulk form)

NOTE: I got it sorted after finding a similar topic posted 11 months ago. I was using libraries-override when I just needed to point to the library in my theme.

I'm trying to override a stylesheet in my Business Responsive theme with my own stylesheet in my Business Sub (sub-theme made from the Business Responsive theme).

The file I'm trying to override is:

themes\business_responsive_theme\css\custom-style.css

With the file:

themes\business_sub\css\custom-style.css

My business_sub.info.yml has this relevant part:

After enabling the Language module and Configuration translation, the site fails on Clear Caches, update.php and possible elsewhere with a general error "The website encountered an unexpected error. Please try again later."

The Recent Log messages shows this on update.php:

I have several referinces to my node from entity reference fields inside paragraphs on other nodes (other CT also) and I'm looking for a way to get ALL entities refering TO my current node in twig. Everything I can find online, seems to deal with getting referenced entities FROM the current node.

I am doing tests to check, in the submit phase, if the node I am inserting is already present or not. The control can be on one or more fields.
I don't know if the solution I wrote is right or not. I tried with the title field and it works, it seems to work also with the entity reference (field_livello), it doesn't work for me with the data field and I didn't understand how to do it.

Here is the code in form_alter
   $form['#validate'][] = 'liveContra_validate';