In some scenarios you may have empty K2 roles with no users added, and in the past it was possible to create new role in K2 Management without adding any users into it or delete all users from the role (this is not the case in current versions of K2). When you have K2 role with no users K2 will be logging error shown below on each attempt to resolve this role (look at Interval configured for this role in DestQueue table to get an idea about error frequency, and the same will be logged every time when role used as a destination etc.):
“1 The K2.net 2003 Destination Queue SecurityLabel provider ” does not exist at K2DestQueue.RunDestQueue(Object obj)”
To address/remove that error you need to identify empty role first which can be done with help of the following SQL query run against K2 DB:
Once empty role identified you either delete it or add some user into it to get rid of error message, or as a third option you can increase its refresh interval in DestQueue table to decrease frequency with which this error will be logged in K2 host server logs.