Drupal 8.x

hello I am using drupal 8.6.2 and every time I login I get the following error in the .theme file 
If I update the page the errors do not appear again while I'm in the session

Thank you very much for the help you can give me.

I have a Drupal 7 site I'm upgrading to Drupal 8. There is a custom "Articles" content type, and after upgrading, trying to edit existing articles or add new ones gives me this error:

Drupal\Core\Entity\Query\QueryException: 'field_last_name:value' not found in Drupal\Core\Entity\Query\Sql\Tables->ensureEntityTable() (line 368 of core\lib\Drupal\Core\Entity\Query\Sql\Tables.php).

'field_last_name' is used by a content type called "Writers". The "Articles" type has a few fields that are set up as entity references to "Writers".

Is there any way to define custom content types without spending days adding types and fields using the UI? For example, is there a way to define the content types, their fields and relationships to other content types in YAML or JSON and then import it into Drupal? Thanks

Hi,

I managed to create a view that displays list of my custom content with filtering criterias supplied by user input. Everything works fine.

But I want to add for example some 'hero image slide' with some text to the top of this view page.

Question: how can I do this? Preferably not touching code.

My idea was to create one more custom content with all required fields for hero image, but then I have to somehow attach my view here... But how? Or am I wrong?

Hi everyone,

I have created several views based on custom content types I made, presented in a table format. Basically I am displaying staff members with all the related basic info (name, email, phone, office number, job title etc).

As the subject says, the libraries file isn't loading the javascript files under (icemagic.libraries.yml).
(Also english isn't my first language so apologies in advance for my grammar)

Here's a look on the code: