Arduino IDE upload error I've recently been trying to make program using IRremote(library) in my Arduino IDE(v1.8.9), but whenever I hit the upload button this error message is returned


  Sketch uses 7514 bytes (23%) of program storage space. Maximum is
  32256 bytes. Global variables use 415 bytes (20%) of dynamic memory,
  leaving 1633 bytes for local variables. Maximum is 2048 bytes.
  
  avrdude: verification error, first mismatch at byte 0x0002
  
  0x5d != 0x62 avrdude: verification error; content mismatch
  
  avrdude: verification error; content mismatch


I'm using Arduino UNO R3

This is the code I'm trying to run

    #include &lt;IRremote.h&gt;
int RECV_PIN = 11;
IRrecv irrecv(RECV_PIN);
decode_results results;

void setup()
{
  Serial.begin(9600);
  irrecv.enableIRIn(); // Start the receiver
}

void loop()
{
  if (irrecv.decode(&amp;results))
    {
     Serial.println(results.value, HEX);
     irrecv.resume(); // Receive the next value
    }
}


Also, every other code(not using the IRremote library) uploads just fine without any errors.
There can be power/connection problem or somehow the bootloader has been damaged.
So 


Check power
Check Connection



If there no problem found, then by using usbasp, avrisp, usbtinyisp, etc reflash the bootloader. I hope your problem will be solved.