Javascript can't execute

[JmRy]

Hello the team,

I have a problem that I cannot resolve with the the javascript code execution contained in a page.

In dev under Vagrant/Homestead the javascript code in the html page is executed correctly, but not on the prod server ...

The OS and all the libraries are the same on the dev and prod machine :

• Ubuntu Server 18.04.5
• Laravel/Framework 6.19.1
• Spatie/Crawler 4.5.7
• puppeteer 5.3.1 with all the necessary dependencies

My code (very simple ...)

    Crawler::create()
            ->setCrawlObserver(new GGCrawlObserver())
            ->executeJavaScript()
            ->setUserAgent('Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:82.0) Gecko/20100101 Firefox/82.0')
            ->setMaximumCrawlCount(1)
            ->setConcurrency(1)
            ->ignoreRobots()
            ->setDelayBetweenRequests(500)
            ->startCrawling('https://....'); 

In Observer

public function crawled(UriInterface $url, ResponseInterface $response, ?UriInterface $foundOnUrl = null)
    {
        $domCrawler = new Crawler(
            (string)$response->getBody()
        );

        $name = $domCrawler
            ->filter('h1')
            ->first()
            ->text();

In dev I easily get the content of H1 which is generated by the page javascript code.
But in prod the error The current node list is empty. is fired. The body content is correctly loaded but its javascript code does not execute !

Maybe a delay issue (faster prod server), but I don't know how to fix it.

Thank you for your help