Communication with the Robot Service fails


I downloaded UipathPlatformInstaller.msi and installed only robot. When UiPath assistant open in orchestrator settings, it says;

Communication with the Robot Service fails. Please try to restart the service.

I checked the service, its running;


Restarted and checked again, same error exists;

When i start UiPath assistant there’s a warning in event viewer;

The application-specific permission settings do not grant Local Activation permission for the COM Server application with CLSID
to the user **************** SID (S-1-5-21-834779354-2564548580-2610709569-1045) from address LocalHost (Using LRPC) running in the application container Unavailable SID (Unavailable). This security permission can be modified using the Component Services administrative tool.

What can we do?



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Hi @ercan.nebiler

The error message you get seems really specific.

I would try to first simply restart your machine to let the service fully refresh and launch again. If that does not fix the issue, I would suggest checking with both our Technical Support here and your own IT department to look for a solution.

I will send a ticket but waiting for the license key. We can’t reach it at the moment. Is there a chance we can get license key via

If it is an issue with Automation Cloud orchestrator, you can contact our support via the Automation Cloud Support using this form instead:

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I sent ticket. Thanks for your support! @loginerror

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Hi!~Have you found any Solution?

Facing same issue… any solution found?

Rebooting my VM worked for me.