Currently all my SSL certificates are out of date. The reason for this seems to be this issue: https://git.ispconfig.org/ispconfig/ispconfig3/issues/4380 There is also a priority thread about this. I want to solve this ASAP, but don't understand the steps to take. Could someone explain the steps to solve this manually? THese are the errors I get from the letsencrypt log: 2017-01-11 02:00:23,344EBUG:certbot.plugins.webroot:Creating root challenges validation dir at /usr/local/ispconfig/interface/acme/.well-known/acme-challenge 2017-01-11 02:00:23,388EBUG:certbot.plugins.webroot:Attempting to save validation to /usr/local/ispconfig/interface/acme/.well-known/acme-challenge/dFv... FailedChallenges: Failed authorization procedure. sub.domain.nl (http-01): urn:acme:error:unauthorized :: The client lacks sufficient authorization :: Invalid response from http://sub.domain.nl/.well-known/acme-challenge/dFv... <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8"> <title>Page not" I assume the .well-known path is somewhere rewritten to the /user/local path instead of to the root of the /web/ folder for that domain??