Erro ao executar arquivo list-students.php

Bom dia. Fiz conforme a aula e estou tendo o seguinte erro ao executar o arquivo:

Código do arquivo list-students.php:

<?php

use Alura\Doctrine\Entity\Course;
use Alura\Doctrine\Entity\Phone;
use Alura\Doctrine\Entity\Student;
use Alura\Doctrine\Helper\EntityManagerCreator;

require_once __DIR__ . '/../vendor/autoload.php';

$entityManager = EntityManagerCreator::createEntityManager();
$studentRepository = $entityManager->getRepository(Student::class);

$studentList = $studentRepository->studentsAndCourses();

foreach ($studentList as $student) {
    echo "ID: $student->id\nNome: $student->name";

    if ($student->phones()->count() > 0) {
        echo PHP_EOL;
        echo "Telefones: ";

        echo implode(', ', $student->phones()
            ->map(fn(Phone $phone) => $phone->number)
            ->toArray());
    }

    if ($student->courses()->count() > 0) {
        echo PHP_EOL;
        echo "Cursos: ";

        echo implode(', ', $student->courses()
            ->map(fn(Course $course) => $course->nome)
            ->toArray());
    }

    echo PHP_EOL . PHP_EOL;
}

$studentClass = Student::class;

$dql2 = "SELECT COUNT(student) FROM $studentClass student";

var_dump($entityManager->createQuery($dql2)->getSingleScalarResult());

echo PHP_EOL;

$dql3 = "SELECT COUNT(student) FROM $studentClass student WHERE SIZE(student.phones) > 1";
var_dump($entityManager->createQuery($dql3)->getSingleScalarResult());

echo PHP_EOL;

$dql4 = "SELECT COUNT(student) FROM $studentClass student WHERE student.phones IS EMPTY";
var_dump($entityManager->createQuery($dql4)->getSingleScalarResult());

Código da minha classe Student:

<?php

namespace Alura\Doctrine\Entity;

use Alura\Doctrine\Repository\DoctrineStudentRepository;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;
use Doctrine\ORM\Mapping\Column;
use Doctrine\ORM\Mapping\Entity;
use Doctrine\ORM\Mapping\GeneratedValue;
use Doctrine\ORM\Mapping\Id;
use Doctrine\ORM\Mapping\ManyToMany;
use Doctrine\ORM\Mapping\OneToMany;

#[Entity(repositoryClass: DoctrineStudentRepository::class)]
class Student
{
    #[Id, GeneratedValue, Column]
    public int $id;

    #[OneToMany(
        mappedBy: "student",
        targetEntity: Phone::class,
        cascade: ["persist", "remove"],
        fetch: 'EAGER'
    )]
    private Collection $phones;

    #[ManyToMany(targetEntity: Course::class, inversedBy: "students")]
    private Collection $courses;

    public function __construct(
        #[Column]
        public readonly string $name
    ) {
        $this->phones = new ArrayCollection();
        $this->courses = new ArrayCollection();
    }

    public function addPhone(Phone $phone)
    {
        $this->phones->add($phone);
        $phone->setStudent($this);
    }

    /**
     * @return Collection<Phone>
     */
    public function phones(): Collection
    {
        return $this->phones;
    }

    public function courses(): Collection
    {
        return $this->courses;
    }

    public function enrollInCourse(Course $course): void
    {
        if ($this->courses->contains($course)) {
            return;
        }

        $this->courses->add($course);
        $course->addStudent($this);
    }
}