There is a known issue related to the localized comments when you change Screen Label for "Ticket" and add a space:
This is located under Service Desk | Configuration | Settings | Screen Labels.
In the Ticket field, if there is a space (ie Support Ticket), this can cause tickets to no longer be accessible.
1) Remove the space from the Ticket field will prevent future tickets from experiencing this issue.
2) For Tickets that are already inaccessible, please contact Support and include the following:
- List of Tickets affected
- Screenshot of the error you receive when attempting to access the ticket (Making sure to hit more info to expand the error).
This issue is resolved in v6.4 SP2. Please go to the download site for the latest version.
Contact Supportif upgrading from 6.3 or earlier, to the latest version.