The certificate does not work for me, although it says that its validity is still a month and that it will auto-renew itself
integr-testing.site
Verify that the relevant DNS record(s) are proxied (orange-clouded). The domain is resolving to 135.xxx.xx.xx with Hetzner. Also, integr-testing.site is presenting a 403 Forbidden error from your origin.
I see that you’ve now proxied (orange-clouded) your domain. I’m now able to reach your site using HTTPS.
The problem was generally related to ispmanager