Smart Trashbin metal detector with coin reward... need help

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Help me!!!! Why the my 2 servo motor are not functioning properly, I only heard click sound but it didn't rotate. What is the possible problem. But the inductive proximity sensor are functioning. What do you is the problem coding or circuit?

#include <Servo.h>

// Define pins
const int proximitySensorPin = 7; // Change as per your setup
const int servoPin1 = 9;          // Servo motor 1
const int servoPin2 = 10;         // Servo motor 2

// Create servo objects
Servo servo1;
Servo servo2;

void setup() {
  // Attach servos to pins
  servo1.attach(servoPin1);
  servo2.attach(servoPin2);
  
  // Set up the proximity sensor pin as input
  pinMode(proximitySensorPin, INPUT);
}

void loop() {
  // Check if the proximity sensor detects metal
  if (digitalRead(proximitySensorPin) == LOW) {
    // Rotate the first servo motor to 180 degrees
    servo1.write(180);
    delay(1000); // Wait for the servo to finish rotating

    // Rotate the second servo motor to 180 degrees
    servo2.write(180);
    delay(1000); // Wait for the servo to finish rotating

    // Return both servos to the initial position
    servo1.write(0);
    servo2.write(0);
    delay(1000); // Wait before starting the next cycle
  }
  // Add a delay to avoid constant triggering
  delay(100);
}