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):

Unable to trigger the task
Forgot Tenant Info
Getting Error popup "A task was canceled" while connecting Uipath and orchestrator


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

UiPath Robot connection fails when try to connect Orchestrator

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




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

Cannot connect 2018.2 Robot (trial) to 2018.3 Orchestrator
Getting Error popup "A task was canceled" while connecting Uipath and orchestrator