Can't build, getting "build failed" with any example "code sign error"

This is my first time using Xcode and OF, I followed the steps: downloaded OF, downloaded Xcode and installed it.
Now I am trying to run any basic example like “3DPrimitivesExample” (as per the steps on and nothing gets built.
I have a bunch of issues: “Validate Project Settings”, “Localization”, “Shell Script Invocation Warning” and “Code Sign Error”. (exit code 1)
I am able to open the .app but I can’t build, debug, etc.
Please help me :frowning:

This is fixed in the nightly download.