Drupal 8.x

When I enabled and edited
@code
 $settings['trusted_host_patterns'] = [
   '^mydomain\.tld$',
   '^.+\.mydomain\.tld$',
   '^mydomain\.tld$',
   '^.+\.mydomain\.tld$',
 ];
@endcode

In /sites/default/settings.php

I get the error:

Redirects to external URLs are not allowed by default, use \Drupal\Core\Routing\TrustedRedirectResponse for it.

If I comment those lines out, I still get the error.

I have just add some categories and they have also  sub-categories but on the list of the categories there showing all parent categories along with sub-categories. But i want show only parent categories in one page and after clicking on the parent categories then show the sub-categories in one page.

list like this

I'm developing a custom module with an image field.

Where can I set the following HTML attribute to my custom field?

<input type=file
       accept="image/*"
       capture=environment>

I have created the image field and i'm able to process some OCR with an external library uploading the image but I need to use webcam instead and I can't find the way to set the "capture=enviroment" tag to my input form in the field widget file.

Thank you

Hello.
I have updated drupal from 8.7.12 to 8.8.5 but now in the status report I have these errors:

    Database updates
    Out of date
    Some modules have database schema updates to install. You should run the database update script immediately.

    Entity/field definitions
    Mismatched entity and/or field definitions
    The following changes were detected in the entity type and field definitions.
    Media

        The Media entity type needs to be installed.

    Media type

Hi,

I'm devolping a Drupal 8 module for employee check-in / check-out time based on QR code reading / decode with an external php library.

I've installed khanamiryan/qrcode-detector-decoder with composer.

Now I need to call the QrReader class inside MyModuleFieldDecoderWidget.php but I got allways an error message like this:

Error: Class 'Drupal\FieldQrDecoder\Plugin\Field\FieldWidget\QrReader' not found.

I've tried with

use Khanamiryan;

and also