You should not have any problem about that when assembling Niryo One because we are assembling and testing all the Niryo Stepper ourselves.
In case you are unmounting and mounting again the Niryo Stepper by yourself, please pay attention to the following.
If you choose a too long screw (23mm on the photo) to tighten the fan on the back of the stepper motor, the screw will touch one of the PCB capacitance, which will be destroyed.
Ensure that you use a shorter screw (19mm max) so it doesn’t touch the capacitance.
If you have already destroyed the capacitance, take it out and replace it with a new one. Here’s the reference of the component.