If the blender is not blending and every other light blinks (like shown in the picture bellow) it means some kind of a blending error. Most likely, the cup is not properly placed (should be right in the middle) or the blending lid is not tightened enough. Please make sure that the cup is placed right in the middle of the base.
Secondly, check if the cup is closed tight enough. This is how a properly closed cup should look like :
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