Arduino UNO ShakeIt Motors connected, no rumble

Hello, I used an arduino UNO with a motor shield and uploaded the sketch for motor shields, in the motor output tab in shakeit motors it appeares that all 4 motors are connected, but when I tried to test them both with the "test now" function and in-game nothing happens.

I connected the shield to a 12v power supply, checked all the connections with the motors and made sure that the shield is properly connected to the arduino. Hope someone can help