Hi,
Could be that you already did it but, Have you generated the code from the GUI configuration tool?
In the examples provided by the FreeRTOS SDK, you need to first generate the code (pins, clocks, peripherals) in order to create and add everything needed for the project to run.
This is not so clearly explained in the examples, but has to be done before running the examples.
Let us know if this helps you or not.