1: Check your motor mounting screws and make sure they are not protruding in to the motors working space.
2: Double check your soldering to make sure its fully contacting the pads, and make sure nothing is bridging solder to other solder, also make sure each solder piece is not touching something like a chip or a heat sink or grounding.
3: Make sure the cables are properly soldered on the motor side.
4: Check the cable connecting the FC to the ESC, if you have another try swapping it out.
5: Try flashing the bios on the FC or updating it.
If that all is good then odds are part of your stack/AIO is dead.