Could not start print job

After moving my system and Lightroom to a new motherboard, when pressing 'print' LR says 'could not start print job'. When I press 'Printer ...' and OK, everything goes well. Meanwhile LR thinks that there are two print jobs, while my printer knows it is only one. When closing LR it says or asks: 'Quit Lightroom? This will end the job it is preparing'

I hope somebody here knows how to solve this, Hans van den Berg, Vleuten, The Netherlands