UiPath Connected system - Not able to connect in Appian 24.4

Hello, I am trying to access UiPath through a connected system.

I have tried to access UiPath through a connected system, but the test connection fails and the following error occurs.
Can you please tell me why I cannot connect?
I am using the cloud version of UiPath and Orchestrator (license is Pro trial).

Thank you in advance.

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