Issue/error in Uipath assistant

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1

Description

Hello, I’m having an issue with my UiPath automation. It works perfectly when I run it from UiPath Studio, but it fails when I start it from the UiPath Assistant or a trigger. I keep getting an error that says,

‘Could not load file or assembly ‘UiPath.System.Activities…’. The system cannot find the file specified.’

Could you please provide a solution for this?

Link

Date

2025-10-13

Related UiPath products

Assistant
Orchestrator
Studio

2

Hi @shlok_rpa

Would it be possible for you to provide the full error text?

3

Hey,

PF, The full error text as below,

‘Could not load file or assembly ‘UiPath.System.Activities, Version=25.10.0.0, Culture=neutral, PublicKeyToken=null’. The system cannot find the file specified.’

4

Could you still share if this will happen to a completely empty project as well?
Also:

  • what is the Studio version
  • what are all the activity packages installed (and their versions) in your project?

One more question - what is the version of the robot/assistant on the machine that has this issue? (is it the same machine as the one with Studio?)