UiPath Studio Web: Unable to Connect to Server with any of the available transports

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UiPath Studio Web: Unable to Connect to Server with any of the available transports

Issue Description

In the UiPath Studio Web, unable to connect to Server with any of the available transports:

SignalR Information: Connection disconnected.

Error Observed

Job Stopped with an unexpected exit code: 0x00000033

System.Exception:Job stopped with an unexpected exit code: 0x00000033

kb-0EMPa00000Q1R2W.png1710×454 109 KB

Root Cause

UiPath Orchestrator or Studio Web deployment is missing or disabled SignalR/WebSocket configuration the Client.

The Robot service should subscribe to Orchestrator's SignalR channels and configure the transport protocols

By default, this setting is enabled, and all available channels are selected:

  • WebSocket
  • Server-Sent Events (SSE)
  • Long Polling

When all transport channels are enabled, the best available transport is automatically selected, in the following priority order: WebSocket > Server-Sent Events > Long Polling.

  1. The WebSocket transport protocol to be used to connect the Robot to Orchestrator's SignalR channels.
  2. The Server-Sent Events (SSE) push technology to be used to connect the Robot to Orchestrator's SignalR channels.
  3. The long polling transport protocol to be used to connect the Robot to Orchestrator's SignalR channels.

For more info, refer to the official documentation here.

Resolution

  1. Navigate to the respective Tenant >> Settings >> Scalability (as shown in the below screenshot)

here1705×457 53.7 KB

  1. Scalability Settings --> Enable SignalR (Robots)
  2. Save

Contact UiPath Product Support

If the issue persists, create a UiPath Support Ticket for further troubleshooting and include:

  1. Gather logs from:
    1. Browser Console
    2. Network trace: How To Generate A HAR File?
  2. Screenshot of the error observed.