Kennel Connection has no control over a blank page being printed and there is no setting in KC to stop it. Once a print job is sent to the printer, it is up to the printer to finalize the job and print the report correctly.
Uninstall/reinstall the printer to see if that fixes the issue. If it does not, you will need to contact the manufacturer of the printer or a local technician to see if they have heard of this issue and have a solution.