Method error - System.String UiPath.IUiSearchResult.GetErrorMsg()'

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Hello everybody,
I need your help. I have a problem with a stream (called X from now) that fails due to a method, below is the error message: Mobile Check VPN Connect: Method not found: ‘System.String UiPath.IUiSearchResult.GetErrorMsg( )’.
Specifically, within stream X I use connection to a VPN, initially I thought it was a package compatibility issue, but then I noticed a few things:

  • If I restart the machine and launch stream X from the orchestrator, it works
  • If the machine turns off and on again and flow Y starts (which does not make connections to the VPN) subsequently flow X goes into error
  • If I connect to the machine and relaunch stream X, it works

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I can’t figure out why, do any of you have any ideas or suggestions? Thank you all!