Copper clad LED problem

sunking73

New member
Hi,
I have completed a Copper Clad built. Everything was ok except i couldn't get the LED to light up. I asked ChatGPT, he told me to connect an extra wire from K pad on PCB to the SW pad on the breakout board.
And it worked !
What did i do wrong ? isn't it supposed to work by only connecting the 4 wires between PCB and board ?
 
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