Hello, I've been having a very strange issue ever since I installed and configured my Ubuntu 14.04/ISPConfig 3.1.10, namely - the main system user can connect via sFTP just fine. However, when I add a site-specific user, they get an error message "Authentication failed. Critical error Cannot connect to server". I've checked the pure-ftpd mysql.conf and logged in successfully to MySQL with the credentials there. Furthermore, I looked in the ispconfig table and all site-specific users are there, marked as active and so on. Could anyone help me figure out what's wrong with my configuration? Thank you!