For Canon MG3520 Troubleshooting, check if the printer’s driver is up-to-date. To verify this, launch the Control Panel and tap on “Devices and Printers”. In addition to this, right-click on your printer and select “Printer Properties” from the drop-down menu. 
Further, click on the “Advanced” tab and look for the “Driver” section. Download and install any updated drivers that are available. Try to print again. If the above methods don’t work, please contact Canon customer support for further assistance.