Module development and code questions

Hello, community.
I want to finalize the ckeditor5_mentions module. It works, when you type @ it gives a list of community members. But I need some tweaks. In this list I want to display not only user logins, but also their real names.
For example, we enter @john
and the drop-down list will show blocks with the following content. For each user, the first line is his real name, and below is his login with @.
For this purpose I added lines with real name in MentionAutocompleteController

Hi,

Google Analytics module is incompatible with my Drupal 11.0.5 site. So I tried to install it, but get an error message. Looking through the reports there's this backtrace (see below). Anybody knows what's going wrong here and how to solve it?

Backtrace report (changed the actual website location with WEBSITE):

Good morning.
I installed Drupal11 and migrated from Drupal7 without any apparent problems, in the sense that at least I was able to import the contents.
Then I added the slideshow module and the related javascript libraries, again without any apparent problems.
I created the first page in slideshow mode, the query is correct, but unfortunately it shows the first post and then it doesn't go forward, neither automatically nor by clicking the advance links.
Unfortunately I don't receive any error messages and I can't figure out what's missing to start the show.

Hello everyone,

I would like to query the google matrix distance.

In a view filter plugin, I'd like to go through the view results to retrieve certain field values to query an API and then exclude IDs that don't meet the conditions.  I don't know how to run the current view and retrieve the results.

Can you help me?

Hey, so i have this multistep form where i need to validate inputs on change and set the class of the buttons to the validation state in order to give a respective color to it. My trouble starts when i navigate from step to step as it looses all the configuration done by the callback validate input... 

<?php

namespace Drupal\myModule\Form;

use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Form\FormBase;

Hi everyone

This code is working for user login, but not when registering a new account.

I'm trying to override the destination redirect if the value is '/home':