ArduinoでCAN受信した信号をシリアル通信しようとするエラーになる

前提・実現したいこと

ArduinoでCAN受信した信号をPCにシリアル通信で出力する際に
なぜかエラーになってしまいます。

前提として、
以前はエラーがなかったところに少しだけ変更をしただけなのに、
少し変更した部分にエラーが発生します。

大きく変えたところはPCからのシリアル信号を受信する部分だったのですが。。

やったこと

正常だったころのCAN受信部

  if(!digitalRead(INT_PIN1))                         // If CAN2_INT pin is low, read receive buffer
  {
    CAN2.readMsgBuf(&CAN2Id, &len, rxBuf);      // Read data: len = data length, buf = data byte(s)
    
    if((CAN2Id & 0x80000000) == 0x80000000)     // Determine if ID is standard (11 bits) or extended (29 bits)
      sprintf(msgString, "  Extended ID: 0x%.8lX  ", (CAN2Id & 0x1FFFFFFF));
    else
      sprintf(msgString, "  Standard ID: 0x%.3lX       ", CAN2Id);
    Serial.print("Message Recieved Successfully! =>");
    Serial.println(msgString);
    sprintf(msgString, "DLC: %1d  Data:", len);
    Serial.print(msgString);
    //Serial.print("  DLC: %1d  Data:", len);
    if((CAN2Id & 0x40000000) == 0x40000000){    // Determine if message is a remote request frame.
      sprintf(msgString, " REMOTE REQUEST FRAME");
      Serial.print(msgString);
    } else {
      for(byte i = 0; i<len; i++){
        sprintf(msgString, " 0x%.2X", rxBuf[i]);
        Serial.print(msgString);
      }
    }
    Serial.println("");
    Serial.println("");
  }

エラーが出るCAN受信部

  if(!digitalRead(INT_PIN3))                         // If CAN2_INT pin is low, read receive buffer
  {
    CAN3.readMsgBuf(&CANrxId, &len, rxBuf);      // Read data: len = data length, buf = data byte(s)
    
    if((CANrxId & 0x80000000) == 0x80000000)     // Determine if ID is standard (11 bits) or extended (29 bits)
      sprintf(msgString, "  Extended ID: 0x%.8lX  ", (CANrxId & 0x1FFFFFFF));
    else
      //sprintf(msgString, "rx:%.3lX", CANrxId);
      sprintf(msgString, "  Standard ID: 0x%.3lX       ", CANrxId);
    Serial.print(msgString);
    //sprintf(msgString, "h,%1d", len);
    sprintf(msgString, "DLC: %1d  Data:", len);
    Serial.print(msgString);
    if((CANrxId & 0x40000000) == 0x40000000){    // Determine if message is a remote request frame.
      sprintf(msgString, " REMOTE REQUEST FRAME");
      Serial.print(msgString);
    } else {
      for(byte i = 0; i<len; i++){
        //sprintf(msgString, ",%.2X", rxBuf[i]);
        sprintf(msgString, " 0x%.2X", rxBuf[i]);
        Serial.print(msgString);
      }
    }
    Serial.println("");
    Serial.println("");
    delay(100);   // send data per 100ms
  }

定義部

long unsigned int CANrxId, CANtxId;
unsigned char len = 0;
unsigned char rxBuf[8];
String txData;
uint8_t msgString[128];                        // Array to store serial string
int i = 0;

今回本当に変更したかったところ
(本当はシリアル信号に従ってCANの送信内容を調整したいが、
まずはシリアル信号の受信ができるところを確認する手前)

  //txData = Serial.readStringUntil("\n");
  //Serial.println(txData);
  
  CANtxId = 0x140;

発生している問題・エラーメッセージ

一部抜粋

C:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino/Print.h:72:12: note:   conversion of argument 1 would be ill-formed:

D:\Arduino\CAN_Box3\CAN_Box3.ino:76:31: warning: invalid conversion from 'uint8_t* {aka unsigned char*}' to 'long int' [-fpermissive]

         Serial.print(msgString);

                               ^

In file included from C:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino/Stream.h:26:0,

                 from C:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino/HardwareSerial.h:29,

                 from C:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino/Arduino.h:232,

                 from C:\Users\�_�a\AppData\Local\Temp\arduino_build_334818\sketch\CAN_Box3.ino.cpp:1:

C:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino/Print.h:73:12: note: candidate: size_t Print::print(long unsigned int, int) <near match>

     size_t print(unsigned long, int = DEC);

            ^

C:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino/Print.h:73:12: note:   conversion of argument 1 would be ill-formed:

D:\Arduino\CAN_Box3\CAN_Box3.ino:76:31: warning: invalid conversion from 'uint8_t* {aka unsigned char*}' to 'long unsigned int' [-fpermissive]

         Serial.print(msgString);

                               ^

exit status 1
no matching function for call to 'print(uint8_t [128])'