I created a new website on my new slave web server, I check ssl and let's encrypt. but it seams it get no certificate and after a short time the checks on ssl and let's encrypt are gone. Where can I find logfiles or something else be able to analyze the problem. let's encrypt on other servers works fine since moth and years. Thanks for help Rainer
Rainer, even as a subscriber it would be nice if you search first, it will save your time and my time. You can find the link to the sticky post which gives you step by step instructions to debug LE issues in basically any post that deals with LE https://www.howtoforge.com/community/threads/lets-encrypt-error-faq.74179/