Error: System.Net.Quic.QuicException: An internal error has occurred. RegistrationOpen failed: Unknown (0x80072726)

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I use the Windows 11 operating system, regardless of whether it is Both Net 9's Quic and my reference to the official msquic.dll will report this error.

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I use the Windows 11 operating system, regardless of whether it is Both Net 9's Quic and my reference to the official msquic.dll will report this error.

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Result =
    WSAIoctl(
        UdpSocket,
        SIO_GET_EXTENSION_FUNCTION_POINTER,
        &WSASendMsgGuid,
        sizeof(WSASendMsgGuid),
        &Datapath->WSASendMsg,
        sizeof(Datapath->WSASendMsg),
        &BytesReturned,
        NULL,
        NULL);
if (Result != NO_ERROR) {
    int WsaError = WSAGetLastError();
    QuicTraceEvent(
        LibraryErrorStatus,
        "[ lib] ERROR, %u, %s.",
        WsaError,
        "SIO_GET_EXTENSION_FUNCTION_POINTER (WSASendMsg)");
    Status = HRESULT_FROM_WIN32(WsaError);
    goto Error;
}  

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I clicked on Window Repair and then reinstalled the latest Windows update. Thank you, Microsoft!

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2025/4/2 0:56:26 Error: System.Net.Quic.QuicException: An internal error has occurred. RegistrationOpen failed: Unknown (0x80072726)

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I used Astrill VPN

[nibanks]

You will need to collect and share the Full.Verbose WPR logs on Windows to diagnose this most likely.