error OTRS-CGI-10 Module Kernel::Modules::CustomerTicketOverView not registered in Kernel/Config.pm!
Seems like maybe their cache/cookies/something with their session history leads them to this error. This is the line from System Log but they receive a full blown error screen:
These select few customers started receiving this error after we finalized our conversion over to uf8 on our db.
Hope this one is an easy fix because we've got more important issues going on
![Sad :(](./images/smilies/icon_sad.gif)