Polypore

Please, could anyone help me?

Hey, I recently started using swift kit, but i realised that the printscreen feature wasnt working How do i get it to work? I have tried simply clicking the PrtScn button on my keyboard, that doesn't automatically save it into the screenshot folder for swiftkit. I have also tried the 'Take Screenshot' button at the top of the swiftkit, that doesnt work either. Any help?