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connectToHostEncrypted: TLS initialization failed

  • I tried to make a request for a free API.
    t is very simple.
    And i got an error:

    connectToHostEncrypted: TLS initialization failed

    It's my first time doing this. I will really appriciate if you please can help me to fix it .

    QNetworkAccessManager mMananger;
    QUrlQuery query;
       query.addQueryItem("page", "2");

    //declaracion de la URL por parte
    QUrl urlPage;
    urlPage.setHost("reqres.in"); /

       QNetworkRequest mRequest;
    //almacena la respuesta
    QNetworkReply * mReply= mMananger.get(mRequest);
        QMetaEnum metaEnum = QMetaEnum::fromType<QNetworkReply::NetworkError>();
        qDebug() << "Error" << metaEnum.valueToKey(mReply->error());
        QByteArray read =mReply->readAll();
        std::cout << "Got response:\n"
    I am using 
    MSCV2019 de 64bits 
    OS Window10
    Thank you

  • Thank you very much for all your answers.
    I took the easy way using maintenance tool.
    and it worked very well

  • Lifetime Qt Champion

    Hi and welcome to devnet,

    Did you forgot to install OpenSSL ?

  • hi, thanks for answering, I am new in this.
    How can i do that?

    i follow the solution of someone else and I already tried to solve it but it is too old.
    i downloaded the installer from
    Web Site
    and selected de option for 64 bits for developers

    after that i included in the .pro file:

    LIBS += -LC:/Program Files/OpenSSL-Win64/lib -lubsec
    INCLUDEPATH += C:/OpenSSL-Win64/include

    and then in the main file

    #include <openssl/aes.h>

    but still doesn´t work i looked in the folder lib and i didn´t see a file named ubsec.lib

  • Lifetime Qt Champion

    You can get OpenSSL through Qt's installer.

    You also have to make she the compiler used to build it matches the one you are using.

    It's a C library, so you are safe compiler wise.

  • Hi @Ana_Ichi.

    You can read an extensive entry here https://forum.qt.io/topic/95700/qsslsocket-tls-initialization-failed.

    It seems kind of funny because there are so many answers through time. Anyway, this works for me, you can test it in Windows:

    1. Install OpenSSL from Maintenance Tool.


    2. Independently of your compiler, go to C:\Qt\Tools\OpenSSL\Win_x64\bin (if you have 64 bits application).

    3. Copy libcrypto-1_1-x64.dll and libssl-1_1-x64.dll and paste in your release or debug application executable.



  • @Ana_Ichi said in connectToHostEncrypted: TLS initialization failed:

    LIBS += -LC:/Program Files/OpenSSL-Win64/lib -lubsec

    I think you will need quotes around that path.

  • Thank you very much for all your answers.
    I took the easy way using maintenance tool.
    and it worked very well

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