PHP Fatal Error no Css Selector

Olá! Estou recebendo o seguinte erro ao tentar executar o buscador de cursos:

PHP Fatal error:  Uncaught Symfony\Component\CssSelector\Exception\SyntaxErrorException: Unclosed/invalid string at 27. in C:\Users\BIANCA.FIALHO\Documents\curso php\php composer\vendor\symfony\css-selector\Exception\SyntaxErrorException.php:47

Meu código:

<?php

require 'vendor/autoload.php';

use GuzzleHttp\Client;
use Symfony\Component\DomCrawler\Crawler;

$client = new Client();

$resposta = $client->request('GET', 'https://cursos.alura.com.br/formacao-desenvolvedor-php');

$html = $resposta->getBody();

$crawler = new Crawler();
$crawler->addHtmlContent('https://cursos.alura.com.br/formacao-desenvolvedor-php');

$cursos = $crawler->filter('span.learning-content__name"');

foreach($cursos as $curso) {
   echo $curso->textContent . PHP_EOL;
}

O arquivo CSS selector para onde o erro aponta:

class SyntaxErrorException extends ParseException
{
    /**
     * @return self
     */
    public static function unexpectedToken(string $expectedValue, Token $foundToken)
    {
        return new self(sprintf('Expected %s, but %s found.', $expectedValue, $foundToken));
    }

    /**
     * @return self
     */
    public static function pseudoElementFound(string $pseudoElement, string $unexpectedLocation)
    {
        return new self(sprintf('Unexpected pseudo-element "::%s" found %s.', $pseudoElement, $unexpectedLocation));
    }

    /**
     * @return self
     */
    public static function unclosedString(int $position)
    {
        return new self(sprintf('Unclosed/invalid string at %s.', $position));
    }

Obrigada!