Monitoring Graphics Processing Unit (GPU) with Processing 3

As @hamoid mentioned, the jar file is there. I downloaded ‘jSensors-2.1.1-jar-with-dependencies.jar’ and put it in my sketch’s ‘libraries’ folder, which I just created. I renamed to file to ‘jSensors.jar’, but when I try to ‘import jSensors.jar’ at the beginning of my sketch (called Testproject.pde), I get the following error:

"
No library found for jSensors

Libraries must be installed in a folder named ‘libraries’ inside the sketchbook folder (see the Preferences window). Testproject.pde:0:0:0:0: The package �jSensors� does not exist. You might be missing a library.
"

What am I doing wrong here?

Thanks in advance.
Thomas