JoinDatatable activity

Hi All,

from where i will get JoinDatatable activity.
In the studio activity guide, we have this activity.


It should be in UiPath.Core.Activities which has now been split into UiPath.System.Activities and UiPath.UiAutomation.Activities


am using Studio 2018.2.3
but am not able to find

when i try to Install UiPath.UiAutomation.Activities,
am facing this