Work Zones
If you are using work zones, verify that work zones and activities are accurately configured for your resources. In addition, ensure that the work zone dictionary is correctly configured to assign activities with correct work zones. Activities that support work zones on activity type level must have all the fields that are used in work zone key correctly populated.
You can use work zone levels to influence those work zones in which they receive work. Assign a higher level to more desirable work zones and a lower level to less desirable work zones. Resources inherit work zones from parent objects like buckets or organizations unless you override the setting at a lower level. If you do not assign a work zone either to a resource or to any of its parents, the application assumes that the resource has no work zones and is thus incompatible with all activities.