The problem seems to have been with my default printer indeed.
Last week, I have received an e-mail from the student organisation responsible for the printers, saying that we should install the new driver since the old one is no longer valid.
I suspected then that the problem is related, however after I've installed the new driver, the error persisted.
I had to change my default printer, in order to get it run unpretentiously.
Thank you, Sean.
