Hi Mo,
digging into it, I have found unfortunately several issues in the project setup.
Good news is: I have the SensorFusion5\KDS\KDS3 FRDM 3DOF Bare Board Tiltmeter\FRDM_KL25Z project running sucessfully now (attached).
Bad news is: I'm able to build and debug the SensorFusion5\KDS\KDS3 FSFK\FSDK_KL25Z too, but it fails at runtime as this demo expects the MultiB shield.
It seems not be prepared and working just with the accelerometer on the board.
I have that project attached for you too.
Just in case this helps,
Erich