Issue
When attempting to access K2 sites such as Management or Workspace, new users can be presented with the following error message:
'Index Was Outside the Bounds of the Array'
Resolution
Restarting the K2 Server service should get everything back in sync, and resolve the error.
Additional Information
This error can sometimes be presented when a new user or group of users is added. The error can throw before K2 has a chance to populate the permissions, roles, and user data across through all of the necessary locations.