What it means
This error usually means that the user who is using Right Click Tools (or service account if you are using a Recast Proxy) is not a Local Administrator on the computer you are trying to run actions against. In order for actions to run successfully you must have local administrator access to the computer you are running against, or you must use a Recast Agent (formerly Recast Device Proxy).
There are two options to resolve:
Make sure that the user that is running the action in the console is a Local Administrator on the computer to which you are targeting actions. This can be accomplished by installing a Recast Service Account Proxy to run the actions as a Service Account if Local Administrator access is not allowed for certain users.
It is also possible to install a Recast Agent (formerly known as a Recast Device Proxy) on a device if it is required that named user accounts do not have Administrator Access to computers. Each agent would need to be installed separately, and would need to be authorized in the Recast Management Server Console.
Information about installing the Recast Agent (Device Proxy) can be found here: Installing Recast Management Server with Proxy