Noticed the upload attempted to program the UNO R3 board, (lights flashing) and then the output window showed the upload forever cycle. Changed the usb cable to a short 6" length with no ferrite on the end of it. The upload worked and proceeding to the next lessons.
I bet the original cable was defective, I normally use 1M cables. You might want to bin that cable.
How long was your other cable? The quality of the cable that you use is also important; it's something that you can't judge from the outside.
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The USB cable is roughly 6 foot with a ferrite noise shield on one end.
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