Following the implementation of Curl, I tried to use my plugin with playground.

It seems something is still missing, as I get the error

PHP Fatal error: Uncaught Error: Call to undefined function Imdb\curl_exec() in /wordpress/wp-content/plugins/lumiere-movies/vendor/jcvignoli/imdbphp/src/Imdb/Request.php:99

where line 99 reads as

$this->page = curl_exec($this->ch);

Thanks!