It's possible to obtain a Canon printer problems notification for a variety of reasons. The following are the most typical causes for your Canon printer that may stop printing. The printer's queue has been overflowing, causing delays in printing. Due to paper jams, printing has been suspended. If the printer is not connected to a wireless network, it cannot print. The printer's power supply is in a state of flux. The Canon printer and the Mobile printing app don't function well together. The printer's firmware and the firewall's firmware must be updated.