Sunra\PhpSimple\HtmlDomParser doesn't work on more recent versions of PHP (e.g., 7.4.29) throwing regular expression compilation errors. This is a know bug (see e.g. sunra/php-simple-html-dom-parser#87) and there is at least one pull request to fix it (e.g., sunra/php-simple-html-dom-parser#88) but looks like development has basically stopped so I can't simply update composer.json.