After upgrading to 6.4 SP2 (6.4.120756), viewing a specific queue and Mine and Unassigned causes the following error: "There was an error retrieving the data for this page".
This is caused by known issue K1-18604.
A hotfix is available to resolve this issue. If you installed Service Pack 2 from a kbin downloaded prior to March 9, 2016 and are affected by this issue, please apply the kbin (k1_hotfix_6_4_120756_K1_18604_20160310.kbin).
You can apply this kbin by going to the following: Settings | Appliance Updates | Manually Update. Select Choose File, locate the kbin and select Update.
NOTE: The version of the K1000 will not be incremented. It will remain 6.4.120756.