Hi, My existing ISPconfig3 has been working great. I am now running on 3.1.1p1 on Ubuntu 14.04.5 on a Linode. Server install was done a year or two ago using the perfect server procedure. Up till now, the various sites I run have SSL certs obtained via StartSSL. Last year, I paid for a Class 2 IV so I can generate my certs and all was going well. However, since the buyout by WoSign and the now distrust, any new certs I create will no longer be trusted by latest versions of browsers, so I'm looking at migrating to another CA. Due to the number of domains I have, this could be quite costly so I'm investigating using LetsEncrypt as an alternative. I've had a quick play, but before I really try things in anger and fear breaking my sites... What I've done so far: from /opt/: Code: git clone https://github.com/Certbot/Certbot cd Certbot ./certbot-auto Upgrading certbot-auto 0.10.2 to 0.11.0... Replacing certbot-auto... An unexpected error occurred: IndexError: list index out of range Please see the logfile 'certbot.log' for more details. OK. cat certbot.log gives: Code: Traceback (most recent call last): File "/root/.local/share/letsencrypt/bin/letsencrypt", line 11, in <module> sys.exit(main()) File "/root/.local/share/letsencrypt/local/lib/python2.7/site-packages/certbot/main.py", line 861, in main args = cli.prepare_and_parse_args(plugins, cli_args) File "/root/.local/share/letsencrypt/local/lib/python2.7/site-packages/certbot/cli.py", line 814, in prepare_and_parse_args helpful = HelpfulArgumentParser(args, plugins, detect_defaults) File "/root/.local/share/letsencrypt/local/lib/python2.7/site-packages/certbot/cli.py", line 442, in __init__ if self.args == 'help': IndexError: list index out of range So am I trying to do something silly? Is my existing Apache2 configuration causing a problem?