I followed this tutorial: https://www.howtoforge.com/tutorial/perfect-server-debian-jessie-nginx-bind-dovecot-ispconfig-3.1 No changes made (i'm fairly experienced user >100 installs of the same tutorial on different configurations). - - - - First default mistake: If i go into ISPc Menu > Monitor > RKhunter log i get this error: Invalid WEB_CMD configuration option: Relative pathname: "/bin/false" - - - - Second error: At first webmail login screen was working and it was accessible at ip-address:8081/webmail(squirrelmail). then after just checking some settings(just clicking at the tabs - not changeing anything) either in the System > Server Config or Email > Email inbox, i cannot login to the webmail, because on the main screen of webmail i get : CONFIGURATION ERROR config.inc.php was not found. Please read the INSTALL instructions! Can you please change the Tutorial and post the necessary changes here?