It seems that your robot is facing some issues due to Proxy/Firewall/VPN restrictions and it is not allowed to connect to Orchestrator.
Also, double-check if the robot is created in Orchestrator and added to the folder. Add then the machine template to the same folder where the robot is present.
Check this documentation for proxy redirection: Redirecting Robots through a Proxy Server
Check this documentation for allowing the needed services for robot connection: Services the Robot Connects to