QSslSocket::connectToHostEncrypted: TLS initialization failed

The problem is to use https Lack of agreement openssl Medium libssl.so and libcrypto.so Or the library version follows qt The version supported by the program is incompatible .
qt5.12.4 Later versions are compatible openssl1.1.x Of , Previous versions supported openssl1.0.x Of , So the openssl1.1.x Version of libssl.so and libcrypto.so Put the library file in qt5.12.4 It is useless when compiling the program directory in the previous version , It should be openssl1.0.x Version of libssl.so and libcrypto.so Library files are valid .
Be careful ： If qt After the compiled program crosses the platform , Will depend on qt Standard library , hold libssl.so and libcrypto.so Put it in qt Standard library catalog , If you don't put , The system will give priority to local libssl.so and libcrypto.so file , The versions of these two files are higher than 1.0.x.