Problem with Connection UiPath Robot Service


I would like to highlight a problem with UiPath. Periodically when we try to run the robot an error message appears related to the connection to UiPath Robot Service. Below you can find the message:
“Could not connect to UiPath Robot Service. Make sure the service is started.”
We tried to restart the virtual machine but the result was negative, then we followed this procedure in order to restart the robot:
“Go to Windows Services (type “services.msc” on startmenu) and start the service named UiRobotSvc”;
But the result was the same and robot is still down.
In order to ease your support I give you the following version informations:
• Windows Virtual Machine 2012 R2
• UiPath 16.2.6274.3352
Waiting for your feedback to solve the problem, thanks in advance for your help.
I wish you a good job and a good evening