I have the error on Behaviour Designer Pro Addons.
Assets\Opsive\BehaviorDesigner\Add-Ons\Shared\Demo\Scripts\ScenarioSelector.cs(91,16): error CS0246: The type or namespace name 'BehaviorTree' could not be found (are you missing a using directive or an assembly reference?)
Assets\Opsive\BehaviorDesigner\Add-Ons\Shared\Runtime\FormationsBase.cs(10,49): error CS0234: The type or namespace name 'Actions' does not exist in the namespace 'Opsive.BehaviorDesigner.Runtime.Tasks' (are you missing an assembly reference?)
Assets\Opsive\BehaviorDesigner\Add-Ons\Shared\Runtime\NavMeshAgentPathfinder.cs(8,18): error CS0234: The type or namespace name 'GraphDesigner' does not exist in the namespace 'Opsive' (are you missing an assembly reference?)
Assets\Opsive\BehaviorDesigner\Add-Ons\Shared\Demo\Scripts\ScenarioSelector.cs(91,16): error CS0246: The type or namespace name 'BehaviorTree' could not be found (are you missing a using directive or an assembly reference?)
Assets\Opsive\BehaviorDesigner\Add-Ons\Shared\Runtime\FormationsBase.cs(10,49): error CS0234: The type or namespace name 'Actions' does not exist in the namespace 'Opsive.BehaviorDesigner.Runtime.Tasks' (are you missing an assembly reference?)
Assets\Opsive\BehaviorDesigner\Add-Ons\Shared\Runtime\NavMeshAgentPathfinder.cs(8,18): error CS0234: The type or namespace name 'GraphDesigner' does not exist in the namespace 'Opsive' (are you missing an assembly reference?)