Code that works on 3.2 not working on LC

/**************************************************************
* Connection                                                  *
***************************************************************
0  <> DIO0
10 <> NSS
11 <> MOSI
12 <> MISO
14 <> SCK
**************************************************************/

#include <RFM69.h>    //get it here: https://www.github.com/lowpowerlab/rfm69
#include <RFM69_ATC.h>//get it here: https://www.github.com/lowpowerlab/rfm69
#include <SPI.h>      //comes with Arduino IDE (www.arduino.cc)

/**************************************************************
* RADIO SETUP                                                 *
**************************************************************/
#define NODEID        01    //unique for each node on same network
#define NETWORKID     204  //the same on all nodes that talk to each other
#define FREQUENCY     RF69_868MHZ
#define ENCRYPTKEY    "7*V9uQ)M<5epl7f#" //exactly the same 16 characters/bytes on all nodes!
#define IS_RFM69HW    //uncomment only for RFM69HW! Leave out if you have RFM69W!
#define ENABLE_ATC    //comment out this line to disable AUTO TRANSMISSION CONTROL

#define ACK_TIME      20 // Number of milliseconds to wait for an ack
#define RETRY_PERIOD  5  // How soon to retry (in seconds) if ACK didn't come in
#define RETRY_LIMIT   5  // Maximum number of times to retry

/**************************************************************
* 32 bit Teensy                                               *
**************************************************************/
#define LED           13 // teensy
#define CLOCKPIN      14 // teensy alternative SCK since first SCK is the LED
#define T3_IRQ_PIN    0  // pin for irq on teensy
#define T3_IRQ_NUM    0  // number for IRQ on teensy
#define T3_SPI_CS     10 // pin for SPI CS on teensy

#define POINTS 6 // number of values to send at each transmission

/**************************************************************
* MISC SETUP                                                  *
**************************************************************/
#define SERIAL_BAUD   115200
#define DEBUG         1 // Set to 1 for serial port output

/**************************************************************
* DATA STRUCTURE                                              *
**************************************************************/
typedef struct __attribute__((__packed__)) {
  uint16_t nodeId;          // Store this nodeId
  float temp;              // Temperature reading
  uint16_t vcc;             // Battery voltage
  byte tx;                 // Transmit level
  float lx;                // Light level
  uint16_t values[POINTS];
} Payload;
Payload theData;

#ifdef IS_RFM69HW
  bool isRFM69HW = true;
#else
  bool isRFM69HW = false;
#endif

uint8_t irqPin = T3_IRQ_PIN;
uint8_t irqNum = T3_IRQ_NUM;
uint8_t csPin = T3_SPI_CS;

#ifdef ENABLE_ATC
  RFM69_ATC radio(csPin, irqPin, isRFM69HW, irqNum);
#else
  RFM69 radio(csPin, irqPin, isRFM69HW, irqNum);
#endif

bool promiscuousMode = false;

void setup() {
  Serial.begin(SERIAL_BAUD);
  while (!Serial) {;} // Wait for serial port to connect
  SPI.setSCK(CLOCKPIN); // alternative SCK pin
  pinMode(LED, OUTPUT);
  pinMode(irqPin, INPUT); // enable INPUT mode on IRQ pin

  radio.initialize(FREQUENCY, NODEID, NETWORKID);

  #ifdef IS_RFM69HW
    radio.setHighPower(); //only for RFM69HW!
  #endif
  radio.encrypt(ENCRYPTKEY);
  radio.promiscuous(promiscuousMode);
  char buff[50];
  sprintf(buff, "\nThe frequency is %d Mhz, Kenneth!", FREQUENCY==RF69_433MHZ ? 433 : FREQUENCY==RF69_868MHZ ? 868 : 915);
  Serial.println(buff);

  #ifdef ENABLE_ATC
    Serial.println("RFM69_ATC Enabled (Auto Transmission Control)");
  #endif
}

void loop() {
  if (radio.receiveDone()) {
    if (radio.DATALEN != sizeof(Payload)) {
      Serial.print("Invalid Payload received!");
    } else {
      theData = *(Payload*)radio.DATA; //assume radio.DATA actually contains our struct and not something else
      if (DEBUG) {
        Serial.print("Node:");
        Serial.print(theData.nodeId);
        Serial.print(", Temp:");
        Serial.print(theData.temp);
        Serial.print(", Lux:");
        Serial.print(theData.lx);
        Serial.print(", Vcc:");
        Serial.print(theData.vcc);
        Serial.print(", TX Level:");
        Serial.print(theData.tx);
        Serial.print(", RSSI:");
        Serial.print(radio.RSSI);
      }
    }

    if (radio.ACKRequested()) { // When a node requests an ACK, respond to the ACK
      radio.sendACK();
      Serial.print(" - ACK sent.");
    }
    
    Serial.println();
  }
}

RFM69_Arduino_to_Teensy3.2_Receiver.ino: In function 'void loop()':

RFM69_Arduino_to_Teensy3.2_Receiver\RFM69_Arduino_to_Teensy3.2_Receiver.ino:105:34: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]

       theData = *(Payload*)radio.DATA; //assume radio.DATA actually contains our struct and not something else

                                  ^

RFM69_Arduino_to_Teensy3.2_Receiver\RFM69_Arduino_to_Teensy3.2_Receiver.ino:105:15: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]

       theData = *(Payload*)radio.DATA; //assume radio.DATA actually contains our struct and not something else

               ^

#define T3_IRQ_PIN    3  // pin for irq on teensy
#define T3_IRQ_NUM   3  // number for IRQ on teensy
#define T3_SPI_CS     2  // pin for SPI CS on teensy

#define T3_IRQ_PIN    2  // pin for irq on teensy
#define T3_IRQ_NUM   2  // number for IRQ on teensy
#define T3_SPI_CS     3  // pin for SPI CS on teensy