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I don’t see your code. The link just goes to code.org home page.
One thing I am seeing in the pictures you provided is that the alligator clamps may not actually be connected to the negative and positive part of the LED sequins. Take a look at this page. The animated gif shows that the clamps need to be touching the metal part of the LED. The black pieces can actually be removed.
If this doesn’t help, you can post your code with the shared link and we’ll take a closer look.
This is actually on the first level of unit 6, lesson 16, which is the setup level, so there is no code shown. It just tells me to connect to the board, hit run, and then the led is supplied to light up. It tied connecting to the led a bunch of different ways but no luck. Is there something else I can do to test it?
Some pins can not be used as in/out pins like the power pins such as the GND or Vout. This is a helpful article on the pins. If this doesn’t help, can you give us more information about where you are receiving this error and what pins you are using?