Qt error message “qt.network.ssl: QSslSocket::connectToHostEncrypted: TLS initialization failed”

Question

I get the following error when I try to run my Qt application:

qt.network.ssl: QSslSocket::connectToHostEncrypted: TLS initialization failed
qt.net

Answer 1

Here is the solution (that worked for me):

• Check which version of OpenSSL was used for the Qt build with qDebug (see Fareanor answer).
• Download a close version of OpenSSl for Windows 64 bits as it is my OS.
• Execute the downloaded installer and check 'Copy OpenSSL DLLs to: The Windows system directory' checkbox.