The missing variable in your equation is no doubt is adding the environment during UiPath robot creation. The contrast in the text isn’t great, so the Environment tab doesn’t stand out quite enough so it’s a step people often miss.
Robots and Environments
Here’s a screenshot of the Robot and Environment tabs, along with the step during the creation of the environment in which you associate the environment with a robot. Notice how when the Environments tab is selected, the Robots tab is easy to miss.
The environment is critical, because when it comes time to create UiPath process, the environment is specified, not the robot.
Running the Process
Make sure the UiPath Assistant indicates the your machine is active, and once the environment is supplied to the process, you should have no problem running your robot!