ntozier, thanks for your comment!But I think I might have been not clear regarding the situation the error occours... I always act as a customer opening a ticket, never as staff:1) I have opened a ticket (as a customer), recieved a confirmation E-Mail, clicked on the link within the E-Mail, the ticket is shown without any errors (/tickets.php?id=4)2) When i click on "Tickets" in the upper right corner (/tickets.php), all my tickets are shown without any error.3) When I click on the logo (/index.php) to access the front page and then click on "Check Ticket Status" (/view.php) I get an error "User unknown" above the (correctly) listet tickets.Maybe you can reproduce the error now?Within the Admin-Dashboard as a result of reloading the /view.php page first I get a message "Failed login attempt (user)" which turns into " Excessive login attempts (user)".Thanks a lot!Gordon