[Koha] Patron export to PDF

Hello all, I have a problem. When I export list of patrons to PDF, the code shows me error that Graphics::Magick is not installed. This module is not mandatory as shown by the koha_perl_deps script. Why is this error still shown? How do I fix this? I tried installing this module but I get a message that the module is already installed and is up to date. Any help is appreciated. Regards, Ketan