trouble with set_rpm()

I tried implementing a very basic code using PyVESC in order to get the motor running at certain RPM's.
For some reason any time I use the set_rpm() method I get a serious spike in the rpm and the measurement reads the RPM at -22389 or a number around that area.
I'd really appreciate any help with this.
Thanks in advance to any helpers.

P.S.
I'm using the Trampa VESC 75/300 controller and the TP power TP100 brushless motor.