$iframe_lazyload  = apply_filters('rocket_lazyload_iframe_html', $iframe_lazyload);
        $iframe_lazyload .= '<noscript>' . $iframe[0] . '</noscript>';

        return $iframe_lazyload;
    }

    /**
     * Replaces the iframe provided by the Youtube thumbnail
     *
     * @param array $iframe Array of matched elements.
     * @return bool|string
     */
    private function replaceYoutubeThumbnail($iframe)
    {
        $youtube_id = $this->getYoutubeIDFromURL($iframe['src']);

        if (! $youtube_id) {
            return false;
        }

        $query = wp_parse_url(htmlspecialchars_decode($iframe['src']), PHP_URL_QUERY);

        $youtube_url = $this->changeYoutubeUrlForYoutuDotBe( $iframe['src'] );
        $youtube_url = $this->cleanYoutubeUrl( $iframe['src'] );
        /**
         * Filter the LazyLoad HTML output on Youtube iframes
         *
         * @since 2.11
         *
         * @param array $html Output that will be printed.
         */
        $youtube_lazyload  = apply_filters('rocket_lazyload_youtube_html', '<div class="rll-youtube-player" data-src="' . esc_attr( $youtube_url ) . '" data-id="' . esc_attr($youtube_id) . '" data-query="' . esc_attr($query) . '"></div>');
        $youtube_lazyload .= '<noscript>' . $iframe[0] . '</noscript>';

        return $youtube_lazyload;
    }

    /**
     * Gets the Youtube ID from the URL provided
     *
     * @param string $url URL to search.
     * @return bool|string
     */
    public function getYoutubeIDFromURL($url)
    {
        $pattern = '#^(?:https?:)?(?://)?(?:www\.)?(?:youtu\.be|youtube\.com|youtube-nocookie\.com)/(?:embed/|v/|watch/?\?v=)?([\w-]{11})#iU';
        $result  = preg_match($pattern, $url, $matches);

        if (! $result) {
            return false;
        }

        // exclude playlist.
        if ('videoseries' === $matches[1]) {
            return false;
        }

        return $matches[1];
    }

    /**
     * Changes URL youtu.be/ID to youtube.com/embed/ID
     *
     * @param  string $url URL to replace.
     * @return string      Unchanged URL or modified URL.
     */
    public function changeYoutubeUrlForYoutuDotBe( $url ) {
        $pattern = '#^(?:https?:)?(?://)?(?:www\.)?(?:youtu\.be)/(?:embed/|v/|watch/?\?v=)?([\w-]{11})#iU';
        $result  = preg_match( $pattern, $url, $matches );

        if ( ! $result ) {
            return $url;
        }

        return 'https://www.youtube.com/embed/' . $matches[1];
    }

    /**
     * Cleans Youtube URL. Keeps only scheme, host and path.
     *
     * @param  string $url URL to be cleaned.
     * @return string      Cleaned URL
     */
    public function cleanYoutubeUrl ( $url ) {
        $parsed_url = wp_parse_url( $url, -1 );
        $scheme     = isset( $parsed_url['scheme'] ) ? $parsed_url['scheme'] . '://' : '//';
        $host       = isset( $parsed_url['host'] ) ? $parsed_url['host'] : '';
        $path       = isset( $parsed_url['path'] ) ? $parsed_url['path'] : '';

        return $scheme . $host . $path;
    }
}
<br />
<b>Fatal error</b>:  Uncaught TypeError: Argument 4 passed to WP_Rocket\Subscriber\Optimization\Lazyload_Subscriber::__construct() must be an instance of RocketLazyload\Iframe, string given in /home/payon/public_html/wp-content/plugins/wp-rocket/inc/classes/subscriber/Optimization/class-lazyload-subscriber.php:75
Stack trace:
#0 [internal function]: WP_Rocket\Subscriber\Optimization\Lazyload_Subscriber-&gt;__construct(Object(WP_Rocket\Admin\Options_Data), Object(RocketLazyload\Assets), Object(RocketLazyload\Image), 'RocketLazyload\\...')
#1 /home/payon/public_html/wp-content/plugins/wp-rocket/vendor/league/container/src/Definition/ClassDefinition.php(47): ReflectionClass-&gt;newInstanceArgs(Array)
#2 /home/payon/public_html/wp-content/plugins/wp-rocket/vendor/league/container/src/Container.php(290): League\Container\Definition\ClassDefinition-&gt;build()
#3 /home/payon/public_html/wp-content/plugins/wp-rocket/vendor/league/container/src/Container.php(90): League\Container\Container-&gt;getFromThisContainer('lazyload_subscr...', Array)
#4 /ho in <b>/home/payon/public_html/wp-content/plugins/wp-rocket/inc/classes/subscriber/Optimization/class-lazyload-subscriber.php</b> on line <b>75</b><br />