Skywriter HAT Problem + Pi4B

Hi, I am trying to use Skywriter HAT in Raspberry Pi 4B.(Bullseye)
I did instaling software following the instruction of One-line Installer from GitHub - pimoroni/skywriter-hat: Skywriter python libraries and examples.
And, when I tried to run, nothing happend even if I waved my hand above the sensor.(just like this)

Since there were other types of ways to install software which are “From PyPi” and “From Source” respectively, I tried both of them. But, the result was same :(

Of cource, I have checked the I2C address.
How do I possibly solve this problem?
I am looking forward to hearing you all.
Many thanks in advance.