WiFiNINA ESP32 Error: invalid header: 0xffffffff

I was trying to use WiFi IDP for some Master Slave communication, this error shows up when ever I upload, I tried to use different ESP32 module put it  keeps showing same error after uploading. I am not user about the library I am using if it causing this issue.

here is the error message in serial monitor:
rst:0x7 (TG0WDT_SYS_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
invalid header: 0xffffffff
invalid header: 0xffffffff
invalid header: 0xffffffff
invalid header: 0xffffffff
invalid header: 0xffffffff
invalid header: 0xffffffff
invalid header: 0xffffffff
invalid header: 0xffffffff
invalid header: 0xffffffff
invalid header: 0xffffffff
invalid header: 0xffffffff
invalid header: 0xffffffff
invalid header: 0xffffffff
invalid header: 0xffffffff
invalid header: 0xffffffff
invalid header: 0xffffffff
invalid header: 0xffffffff
invalid header: 0xffffffff
invalid he⸮ets Jul 29 2019 12:21:46

Here is my code

#include <SPI.h>
#include <WiFiNINA.h>
#include <WiFiUdp.h>

int status = WL_IDLE_STATUS;
int packetSize;
String MegaMsg;

#include "arduino_secrets.h"
///////please enter your sensitive data in the Secret tab/arduino_secrets.h
char ssid[] = SECRET_SSID;        // your network SSID (name)
char pass[] = SECRET_PASS;    // your network password (use for WPA, or use as key for WEP)
int keyIndex = 0;            // your network key index number (needed only for WEP)

unsigned int localPort = 2390;      // local port to listen on

char packetBuffer[256]; //buffer to hold incoming packet
char  ReplyBuffer[] = "acknowledged";       // a string to send back
//char SendMsg[] = "QR Detected";

WiFiUDP Udp;

void setup() {
  //Initialize serial and wait for port to open:
  Serial.begin(9600);
  Serial1.begin(9600);

  while (!Serial) {
    ; // wait for serial port to connect. Needed for native USB port only
  }

  // check for the WiFi module:
  if (WiFi.status() == WL_NO_MODULE) {
    Serial.println("Communication with WiFi module failed!");
    // don't continue
    while (true);
  }

  //  String fv = WiFi.firmwareVersion();
  //  if (fv < WIFI_FIRMWARE_LATEST_VERSION) {
  //    Serial.println("Please upgrade the firmware");
  //  }

  // attempt to connect to WiFi network:
  while (status != WL_CONNECTED) {
    Serial.print("Attempting to connect to SSID: ");
    Serial.println(ssid);
    // Connect to WPA/WPA2 network. Change this line if using open or WEP network:
    status = WiFi.begin(ssid, pass);

    // wait 10 seconds for connection:
    delay(10000);
  }
  Serial.println("Connected to WiFi");
  printWifiStatus();

  Serial.println("\nStarting connection to server...");
  // if you get a connection, report back via serial:
  Udp.begin(localPort);
}

void loop() {

  // if there's data available, read a packet
  packetSize = Udp.parsePacket();
  if (packetSize) {
    //    Serial.print("Received packet of size ");
    //    Serial.println(packetSize);
    //    Serial.print("From ");
    IPAddress remoteIp = Udp.remoteIP();
    //    Serial.print(remoteIp);
    //    Serial.print(", port ");
    //    Serial.println(Udp.remotePort());

    // read the packet into packetBufffer
    int len = Udp.read(packetBuffer, 255);
    if (len > 0) {
      packetBuffer[len] = 0;
    }
    Serial.println("Contents:");
    Serial.println(packetBuffer);

    if (strcmp(packetBuffer, "w") == 0) {
      Serial.println("Forward");
      Serial1.print("w");
    }
    if (strcmp(packetBuffer, "s") == 0) {
      Serial.println("Reverse");
      Serial1.print("s");
    }
    if (strcmp(packetBuffer, "a") == 0) {
      Serial.println("Turn Left");
      Serial1.print("a");
    }
    if (strcmp(packetBuffer, "d") == 0) {
      Serial.println("Turn Right");
      Serial1.print("d");
    }
    if (strcmp(packetBuffer, "stop") == 0) {
      Serial.println("Stop");
      Serial1.print("ss");
    }

    // send a reply, to the IP address and port that sent us the packet we received
    Udp.beginPacket(Udp.remoteIP(), Udp.remotePort());
    Udp.write(ReplyBuffer);
    Udp.endPacket();
  }

  if (Serial1.available() > 0) {
    MegaMsg = Serial1.readString();
    Serial.print(MegaMsg);
    Udp.beginPacket(Udp.remoteIP(), Udp.remotePort());
    Udp.print(MegaMsg);
    Udp.endPacket();
  }
  //
  //  Udp.beginPacket(Udp.remoteIP(), Udp.remotePort());
  //  Udp.print("Standby");
  //  Udp.endPacket();
  //  Serial.println("Message Sent");
}