How do i fix this error ?

well im trying to make a water sensor click mouse button 1 Mouse.Click()
and im getting an error that i havnt included Mouse.h when i have included it how can i fix this ?

#include <Mouse.h>

/*
  AnalogReadSerial

  Reads an analog input on pin 0, prints the result to the Serial Monitor.
  Graphical representation is available using Serial Plotter (Tools > Serial Plotter menu).
  Attach the center pin of a potentiometer to pin A0, and the outside pins to +5V and ground.

  This example code is in the public domain.

  http://www.arduino.cc/en/Tutorial/AnalogReadSerial
*/

// the setup routine runs once when you press reset:
void setup() {
  // initialize serial communication at 9600 bits per second:
  pinMode(A0,INPUT);
  Serial.begin(9600);
  Mouse.begin();
}

// the loop routine runs over and over again forever:
void loop() {
  // read the input on analog pin 0:
  int sensorValue = analogRead(A0);
  // print out the value you read:
  Serial.println(sensorValue);
  delay(1);        // delay in between reads for stability
   if(digitalRead(A0) == HIGH){
    Mouse.click();
   }
}

Which Arduino board are you using ?

Only boards based on the 32u4 or SAMD chips can use the Mouse library

arduino uno r3

UKHeliBob:
Which Arduino board are you using ?

Only boards based on the 32u4 or SAMD chips can use the Mouse library

lolerilol:
arduino uno r3

Change boards to fix error.