I have n error "TypeError: Failed to fetch"

Hi i try to upload a simple code on my arduino nano and the Create show me the error from bellow image.

Pic from above

This is the example I mean.

// the setup routine runs once when you press reset:
void setup() {
  // initialize serial communication at 9600 bits per second:

// 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:
  delay(1);        // delay in between reads for stability

Notice how it reads the port into variable first.