Worked with 3.1.13 before. We now recognized some problems: Problem 1. Remote API User lost "Domaintool functions" right (unchecked after update). Is there a szenario which could lead to this effect? - The new Created web then had no domains in domainpool. After manually adding to the pool and assigning them to the web the Website was shown, but Lets Encrypt not working. Leading to: Problem 2. After activating Let's Encrypt for the web (vhost), the SSL was provided for the webdomain - But not for the subdomain of web. The subdomains of the aliasdomains where provided with SSL. We then activated "Skip Lets Enrypt Check" in Serverconfig to solve that. LE now working for web and all subdomains btw.: before in 3.1.13 we had the problem that LE was only generated for the subdomain but not for the webdomain when a vhost was changed. Excactly the other way round like now with 3.1.13p1.