Basic Assembly and Setup

I have followed the instruction and at the stage of flashing testBuzzer, I come across a few errors.

The serial monitor output looks like this:

The baud rate is set to 115200 and No line ending is set.

It compiles okay but I get this error when flashing.

Arduino: 1.8.13 (Windows 10), Board: "Arduino Uno"

Sketch uses 5362 bytes (16%) of program storage space. Maximum is 32256 bytes.

Global variables use 328 bytes (16%) of dynamic memory, leaving 1720 bytes for local variables. Maximum is 2048 bytes.

avrdude: stk500_paged_load(): (a) protocol error, expect=0x10, resp=0x61

avrdude: stk500_cmd(): programmer is out of sync

avr_read(): error reading address 0x0000

read operation not supported for memory "flash"

avrdude: failed to read all of flash memory, rc=-2

avrdude: stk500_disable(): protocol error, expect=0x14, resp=0xeb

avrdude: stk500_disable(): protocol error, expect=0x14, resp=0xeb

This report would have more information with

"Show verbose output during compilation"

option enabled in File -> Preferences.

Any help will be much appreciated!