My DHT22 module doesn`t work at all I had bought this DHT22 module on AliExpress. The module looks fine, but it does not work at all. I had tried lots of sketches, I tried to change the pin, I tried to change the cables, but I always have the same result:
Failed to read from DHT22 sensor!.
That's what I get if I use the standard sketch DHTtester.ino:

That's what I get if I use the standard sketch DHT_Unified_Sensor.ino:

Can you help me? Or is the module corrupted?
The product page you linked to has modules of different types.
Make sure you have uncommented the matching type in the this section of the example:
// Uncomment whatever type you're using!
//#define DHTTYPE DHT11   // DHT 11
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
//#define DHTTYPE DHT21   // DHT 21 (AM2301)

Also makers of these boards sometimes label them incorrectly or describe them incorrectly when selling them.  If you're unsure what you have, try them all.