Why did the German blitzkrieg, which occupied most of the European continent in World War II, not work against the Soviet Union?

Why did the German blitzkrieg, which occupied most of the European continent in World War II, not work against the Soviet Union?
On September 1, 1939, the German army blitzed Poland, and the European battlefield of World War II broke out.

on September 1, 1939, German troops blitzed Poland, and the European battlefield of World War II broke out. In just over a month, the Germans occupied the whole of Poland. In the spring and summer of 1940, the German army continued to practice its "Blitzkrieg" theory. Small countries such as the Netherlands, Belgium, and Luxembourg fell apart one after another, and even France, the "first army power in Europe," collapsed under the German Blitzkrieg offensive. In less than a year, except for Britain across the sea and a few neutral countries, most of the European continent was occupied by the Germans.

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Why did the Germans fail in their blitz attack on the Soviet Union?