10.000 steps but 100 active calories counted, is it possible or is it an error? Usually get to 480Kcal by 12.000 steps

As long as your watch has a HR sensor, the number of Active Calories depend on your HR, and whether and how much the HR exceeds the Resting HR. The number of steps is irrelevant. Verify your 7 days average Resting HR, and have a look at your HR during the day.