Using HTTP with Entra ID connector action in Copilot Studio topic

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Posted on by inzil2k

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I'm trying to use an HTTP with Entra ID (preauthorized) action in Copilot Studio but it results in the following error:

Error Message: Evaluating PowerFx expression resulted in error while invoking the connector : PVA.InvokeHttp failed: JsonReaderException '<' is an invalid start of a value. LineNumber: 1 | BytePositionInLine: 0. Error Code: ConnectorPowerFxError Conversation Id: 155bc02d-be5f-408f-aa17-a1bbfcb882f1 Time (UTC): 2025-11-20T09:48:21.332Z

The connection in the action is set up to use on-premise gateway. The same connection works in Power Automate but not in Copilot Studio directly. Any ideas?

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