How to fix spindle motor issues on my STEPCRAFT CNC machine?

Hello, I recently purchased a STEPCRAFT CNC machine and I'm encountering some difficulties with the spindle motor. It's not starting or running properly. I've checked all the connections and made sure everything is properly set up, but the motor still doesn't seem to be functioning correctly. Is there any troubleshooting guidance you can provide to help me resolve this issue? I would greatly appreciate your assistance in getting the spindle motor up and running smoothly. Thank you!