Unable to use MCP23017 with Adafruit MCP23017 LCD Hat

[SuperNinja-4965]

My code is as follows:
`// Connect pin #12 of the expander to Analog 5 (i2c clock)
// Connect pin #13 of the expander to Analog 4 (i2c data)
// Connect pins #15, 16 and 17 of the expander to 3V3 (address selection)
// Connect pin #9 of the expander to 5V (power)
// Connect pin #10 of the expander to ground (common ground)
// Connect pin #18 through a ~10kohm resistor to 5V (reset pin, active low)

// Input #0 is on pin 21 so connect a button or switch from there to ground

// include the library code:
#include <Wire.h>
#include <Adafruit_RGBLCDShield.h>
#include <utility/Adafruit_MCP23017.h>
//#include "Adafruit_MCP23017.h"

// The shield uses the I2C SCL and SDA pins. On classic Arduinos
// this is Analog 4 and 5 so you can't use those for analogRead() anymore
// However, you can connect other I2C sensors to the I2C bus and share
// the I2C bus.
Adafruit_RGBLCDShield lcd = Adafruit_RGBLCDShield();
Adafruit_MCP23017 mcp;

// These #defines make it easy to set the backlight color
#define RED 0x1
#define YELLOW 0x3
#define GREEN 0x2
#define TEAL 0x6
#define BLUE 0x4
#define VIOLET 0x5
#define WHITE 0x7
#define addr1 7 // 7 = A1 high, A2 high, A3 high

void setup() {
// Debugging output
Serial.begin(9600);
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
mcp.begin(addr1);
mcp.pinMode(0, INPUT);
mcp.pullUp(0, HIGH); // turn on a 100K pullup internally

pinMode(13, OUTPUT); // use the p13 LED as debugging

// Print a message to the LCD. We track how long it takes since
// this library has been optimized a bit and we're proud of it :)
int time = millis();
lcd.print("Hello, world!");
time = millis() - time;
Serial.print("Took "); Serial.print(time); Serial.println(" ms");
lcd.setBacklight(RED);
}

uint8_t i=0;
void loop() {
// set the cursor to column 0, line 1
// (note: line 1 is the second row, since counting begins with 0):
lcd.setCursor(0, 1);
// print the number of seconds since reset:
lcd.print(millis()/1000);

uint8_t buttons = lcd.readButtons();

if (buttons) {
lcd.clear();
lcd.setCursor(0,0);
if (buttons & BUTTON_UP) {
lcd.print("UP ");
}
if (buttons & BUTTON_DOWN) {
lcd.print("DOWN ");
}
if (buttons & BUTTON_LEFT) {
lcd.print("LEFT ");
}
if (buttons & BUTTON_RIGHT) {
lcd.print("RIGHT ");
}
if (buttons & BUTTON_SELECT) {
lcd.print("SELECT ");
}
}
digitalWrite(13, mcp.digitalRead(0));
}`

for some reson the hat is working but the other MCP23017 chip