Arduino Uno Error

When I click Upload, the RX LED blinks once per attempt but nothing else happens. I tried pressing the reset button during upload but the result is the same. The error 'programmer is not responding / not in sync: resp=0x00' repeats for all 10 attempts. I am a complete beginner, just starting out with an Arduino kit, so any simple and clear guidance would be greatly appreciated. https://preview.redd.it/jm1m2uefrp1h1.png?width=1919&format=png&auto=webp&s=a9d3824e248194995a532524d9ede2691d891bfb submitted by /u/croquetecrocante [link] [comments]