Fatal: Unable to access ‘github.com/theos/heade… ‘: LibreSSL SSL_connect: SSL_ERROR_SYSCALL in connection to github.com:443

MonoProxy Settings are as follows:

  1. Check the IPv6 Support
  2. Select Exclude Simple HostNames

As shown in figure3. Change the github clone mode from HTTP to SSH, as follows

git clone --recursive [email protected]:theos/theos.git $THEOS