Welcome to the UIpath Community.
Go to services.msc and check whether UiRobot is running or not.
What is services.msc ?
It’s there in our system and under this you can find all running services in that system.
Go to Task Manager, then Services tab
To get to Task Manager, right click on Taskbar and choose Task Manager. Or use the Search for Services
Could you please restart UIpath Service and then try once.
If still error persist then uninstall UIpath and then reinstall it.