I'm working on part 3-1 and I get this error message when I run Serial Monitor on the IDE.

Board at usb:0/1D0000/0/1/4 is not available

Here is the sketch:

// Advanced Microcontroller-based Audio Workshop
//
// http://www.pjrc.com/store/audio_tutorial_kit.html
// https://hackaday.io/project/8292-mic...-supercon-2015
//
// Part 3-1: Peak Detection


///////////////////////////////////
// copy the Design Tool code here
///////////////////////////////////

#include <Audio.h>
#include <Wire.h>
#include <SPI.h>
#include <SD.h>
#include <SerialFlash.h>

// GUItool: begin automatically generated code
AudioPlaySdWav playSdWav1; //xy=168,123
AudioAnalyzePeak peak1; //xy=343,188
AudioAnalyzePeak peak2; //xy=368,252
AudioOutputI2S i2s1; //xy=500.00000762939453,110.0000057220459
AudioConnection patchCord1(playSdWav1, 0, peak1, 0);
AudioConnection patchCord2(playSdWav1, 0, i2s1, 0);
AudioConnection patchCord3(playSdWav1, 1, peak2, 0);
AudioConnection patchCord4(playSdWav1, 1, i2s1, 1);
AudioControlSGTL5000 sgtl5000_1; //xy=220,377.0000047683716
// GUItool: end automatically generated code



// Use these with the Teensy Audio Shield
#define SDCARD_CS_PIN 10
#define SDCARD_MOSI_PIN 7
#define SDCARD_SCK_PIN 14

// Use these with the Teensy 3.5 & 3.6 SD card
//#define SDCARD_CS_PIN BUILTIN_SDCARD
//#define SDCARD_MOSI_PIN 11 // not actually used
//#define SDCARD_SCK_PIN 13 // not actually used

// Use these for the SD+Wiz820 or other adaptors
//#define SDCARD_CS_PIN 4
//#define SDCARD_MOSI_PIN 11
//#define SDCARD_SCK_PIN 13

void setup() {
Serial.begin(9600);
AudioMemory(10);
sgtl5000_1.enable();
sgtl5000_1.volume(0.5);
SPI.setMOSI(SDCARD_MOSI_PIN);
SPI.setSCK(SDCARD_SCK_PIN);
if (!(SD.begin(SDCARD_CS_PIN))) {
while (1) {
Serial.println("Unable to access the SD card");
delay(500);
}
}
delay(1000);
}

// for best effect make your terminal/monitor a minimum of 62 chars wide and as high as you can.

elapsedMillis msecs;

void loop() {
if (playSdWav1.isPlaying() == false) {
Serial.println("Start playing");
//playSdWav1.play("SDTEST1.WAV");
playSdWav1.play("SDTEST2.WAV");
//playSdWav1.play("SDTEST3.WAV");
//playSdWav1.play("SDTEST4.WAV");
delay(10); // wait for library to parse WAV info
}

if (msecs > 40) {
if (peak1.available() && peak2.available()) {
msecs = 0;
float leftNumber = peak1.read();
float rightNumber = peak2.read();
int leftPeak = leftNumber * 30.0;
int rightPeak = rightNumber * 30.0;
int count;
for (count=0; count < 30-leftPeak; count++) {
Serial.print(" ");
}
while (count++ < 30) {
Serial.print("<");
}
Serial.print("||");
for (count=0; count < rightPeak; count++) {
Serial.print(">");
}
while (count++ < 30) {
Serial.print(" ");
}
Serial.print(leftNumber);
Serial.print(", ");
Serial.print(rightNumber);
Serial.println();
}
}
}

What have I done wrong, how do I fix it?

Thanks!