Can't install the WDA - 'RoutingHTTPServer/RoutingConnection.h' file not found

Our tests worked fine on xcode 8 however after upgrade to xcode 9 when we try to build it we get the below issue:
‘RoutingHTTPServer/RoutingConnection.h’ file not found

any idea what are the steps in order to install the WDA again allowing us to still run our tests?

Have you run ./Scripts/ before trying to build?

You are right!

Thanks mate, most appreciated!