Rhodes does not support ruby 2.0 or above.
You need to install ruby 1.9.3.
Kindly check with ruby 1.9.3.
But rhoconnect supported on ruby 2.0 and ruby 2.1 as well.
Rho 5.0 requires a newer NDK. Below is the
link. You will need the one form the top section as this contains
toolchains that you will need.
What is needed is the 4.8 version of the files in your ndk > toolchains directory.
I could not find ver r9c and thus had to go to ver 10.