I can't get an I2C TCA9548a Multiplexer to recognize Nicle Sense MEs

Development Boards MicroMod
4

I can post all of the code…

Here it is:

// --------------------------------------
// i2c_scanner
//
// Modified from https://playground.arduino.cc/Main/I2cScanner/
// --------------------------------------

#include <Wire.h>

// Set I2C bus to use: Wire, Wire1, etc.
#define WIRE Wire
uint8_t _multiplexerAddress=0x70;
uint8_t _channel = 0x7;

void multiplexerActivateChannel(uint8_t channel=7)
{  
  Wire.beginTransmission(_multiplexerAddress);
  Wire.write(1 << channel);
  Wire.endTransmission();
}

void setup() {
  WIRE.begin();

  Serial.begin(9600);
  while (!Serial)
     delay(10);
  Serial.println("\nI2C Scanner");
  multiplexerActivateChannel(_channel);
}


void loop() {
  byte error, address;
  int nDevices;

  Serial.println("Scanning...");

  nDevices = 0;
  for(address = 1; address < 127; address++ ) 
  {
    

    WIRE.beginTransmission(address); 
    error = WIRE.endTransmission();
    if (error == 0)
    {
      Serial.print("I2C device found at address 0x");
      if (address<16) 
        Serial.print("0");
      Serial.print(address,HEX);
      Serial.println("  !");

      nDevices++;
    }
    else if (error==4) 
    {
      Serial.print("Unknown error at address 0x");
      if (address<16) 
        Serial.print("0");
      Serial.println(address,HEX);
    }    
  }
  if (nDevices == 0)
    Serial.println("No I2C devices found\n");
  else
    Serial.println("done\n");

  delay(5000);           // wait 5 seconds for next scan
  if(_channel == 0x7){
    _channel = 0x0;
  }else if(_channel == 0x0){
    _channel = 0x2;
  }
  else{
    _channel = 0x7;
  }
  Serial.println("Channel is now : " + String(_channel));
  multiplexerActivateChannel(_channel);
}