Centos 7 — Getting Error setting up base repository during installation

Now being at Installation Summary screen I'm getting Error setting up base repository. When I click on Verify at Installation Source screen I get This media is not good to install from. Rather cryptic error message...

[SOLVED] CentOS 7 internet installation source failing
You have an error in the mirror URL (and extra x at x64) it should be http://mirrors.kernel.org/centos/7/os/x86_64