Getting errors when trying to seed tables in Laravel

When I'm trying to execute php artisan migrate:fresh --seed command I'm getting errors. I don't understand what they are all about and I don't know what could cause them. The description of the problem is below.

Factory file PostFactory.php:

<?php

namespace Database\Factories;

use App\Models\Post;
use Illuminate\Database\Eloquent\Factories\Factory;

class PostFactory extends Factory
{
    /**
     * The name of the factory's corresponding model.
     *
     * @var string
     */
    protected $model = Post::class;

    /**
     * Define the model's default state.
     *
     * @return array
     */
    public function definition()
    {
        $title = $faker->realText(rand(10, 40));
        $short_title = \Illuminate\Support\Str::length($title) > 30 ? mb_substr($title, 0, 30) . "..." : $title;
        $created = $faker->dateTimeBetween("-30days", "-1days");

        return [
            "title" => $title,
            "short_title" => $short_title,
            "author_id" => rand(1, 4),
            "descr" => $faker->realText(100, 500),
            "created_at" => $created,
            "updated_at" => $created
        ];
    }
}

DatabaseSeeder.php:

<?php

namespace Database\Seeders;

use Illuminate\Database\Seeder;

class DatabaseSeeder extends Seeder
{
    /**
     * Seed the application's database.
     *
     * @return void
     */
    public function run()
    {
        \App\Models\User::factory()->count(4)->create();
        \App\Models\Post::factory()->count(15)->create();
    }
}

When I execute php artisan migrate:fresh --seed I'm getting those errors:

Illuminate\Database\QueryException 

  SQLSTATE[HY000] [2002]   , ..      .
 (SQL: SHOW FULL TABLES WHERE table_type = 'BASE TABLE')

  at C:\xampp\htdocs\laralove\vendor\laravel\framework\src\Illuminate\Database\Connection.php:692
    688▕         // If an exception occurs when attempting to run a query, we'll format the error
    689▕         // message to include the bindings with SQL, which will make this exception a   
    690▕         // lot more helpful to the developer instead of just the database's errors.     
   Illuminate\Database\QueryException 

  SQLSTATE[HY000] [2002]   , ..      .
 (SQL: SHOW FULL TABLES WHERE table_type = 'BASE TABLE')

  at C:\xampp\htdocs\laralove\vendor\laravel\framework\src\Illuminate\Database\Connection.php:692
    688▕         // If an exception occurs when attempting to run a query, we'll format the error
    689▕         // message to include the bindings with SQL, which will make this exception a
    690▕         // lot more helpful to the developer instead of just the database's errors.
    691▕         catch (Exception $e) {
  ➜ 692▕             throw new QueryException(
    693▕                 $query, $this->prepareBindings($bindings), $e
    694▕             );
    695▕         }
    696▕

  1   C:\xampp\htdocs\laralove\vendor\laravel\framework\src\Illuminate\Database\Connectors\Connector.php:70
      PDOException::("SQLSTATE[HY000] [2002]   , ..      .
")

  2   C:\xampp\htdocs\laralove\vendor\laravel\framework\src\Illuminate\Database\Connectors\Connector.php:70
      PDO::__construct("mysql:host=localhost;port=3306;dbname=laralove", "root", "", [])

I've checked the lines in the files provided in the error description but I've no clue what can be causing the errors.

Any help would be very appriciated

UPD 0:

I've tried to change 'localhost' to '127.0.0.1' in config files as @Rwd suggested. And previous errors are gone. But now I'm getting other errors:

ErrorException 

  Undefined variable: faker

  at C:\xampp\htdocs\laralove\database\factories\PostFactory.php:24
     20▕      * @return array
     21▕      */
     22▕     public function definition()
     23▕     {
  ➜  24▕         $title = $faker->realText(rand(10, 40));
     25▕         $short_title = \Illuminate\Support\Str::length($title) > 30 ? mb_substr($title, 0, 30) . "..." : $title;
     26▕         $created = $faker->dateTimeBetween("-30days", "-1days");
     27▕
     28▕         return [

  1   C:\xampp\htdocs\laralove\database\factories\PostFactory.php:24
      Illuminate\Foundation\Bootstrap\HandleExceptions::handleError("Undefined variable: faker", "C:\xampp\htdocs\laralove\database\factories\PostFactory.php", [])

  2   C:\xampp\htdocs\laralove\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Factories\Factory.php:385
      Database\Factories\PostFactory::definition()

UPD 1:

Replaced $faker with $this->faker as @Cristea suggested and now getting those previous errors:

  1   C:\xampp\htdocs\laralove\vendor\laravel\framework\src\Illuminate\Database\Connectors\Connector.php:70
      PDOException::("SQLSTATE[HY000] [2002]   , ..      .
")

  2   C:\xampp\htdocs\laralove\vendor\laravel\framework\src\Illuminate\Database\Connectors\Connector.php:70
      PDO::__construct("mysql:host=localhost;port=3306;dbname=laralove", "root", "", [])

localhost is still changed to 127.0.0.1 in .env and database.php as @Rwd suggested

source https://stackoverflow.com/questions/68107187/getting-errors-when-trying-to-seed-tables-in-laravel