Unable to start robot throwing error: "A task was cancelled"

Scenario: Unable to connect robots to orchestrator

Steps to reproduce: Added screen shots

Current Behavior: throwing an error

Expected Behavior: Should add connection with orchestrator

Studio/Robot/Orchestrator Version: robot 2017

Last stable behavior:
Last stable version:
OS Version: Windows server
Others if Relevant: (workflow, logs, .net version, service pack, etc):


If you can access your orchestrator link through url, this might resolve your issue.

There is explaination on how to make the robot https trafic going through a specified proxy.



HI, I am not behind proxy. robot was connected earlier without any issues.
This is the orchestrator url

I see,

I tried to login there and this instance of demo orchestrator is very slow probably because it is holding a larg amount of tenants and might cause the connection timing out.

If it is an acceptable solution for you, i would recommend you to use the latest instance provided by UiPath for demo purpose. The version there is 2017.1



1 Like

worked cheers :slightly_smiling_face:

Hi, I have the same problem, and tried to do it in http://platform.uipath.com/ but im getting the same error: “A task was cancelled”


Any idea ? Thank you guys

Regards :mage:

Ok… I suposse that I’m working from the company and from here the connection is blocked… So I’ll try it from home.

Thanks guys :mage:

Hi Pablo,

Did you succeed at home to fix the error?

I had the same problem as you had, first I tried from the company to publish that and failed.
So I tried in my home to update it but still, it shows the same error:
Error: A task was canceled. —> System.ServiceModel.FaultException: A task was canceled.
The link to the orchestrator that I use is: https://platform.uipath.com

Hope that there is someone that knows how to fix it.

hi @eli,

I fixed the problem ending the service from the task manager…

Hope it works for you, bests regards.


Solved: A task was cancelled
By ending Uipath Robot User service from task manager.
The link to the orchestrator that I use is: https://lts-platform.uipath.com