Sorry for the late reply.
Our programmers checked it in our side. It is very complex to scrape the meta keywords and description from this website.
Is there any other website you can try?
https://smallseotools.com/meta-tags-analyzer/
http://www.submitexpress.com/cgi-bin/analyzer/metahtn.pl
http://metatag-analyzer.com/report.php?url=https%3A%2F%2Fmos-kfzteile.de
http://seoguide.submitshop.com/cgi-bin/webpage-analyzer/meta.pl