If you are a casual user facing a "5B00" error, this tool is a temporary software fix for a hardware problem. If you use it, you ensure you have physically cleaned or replaced the waste ink pads, or you risk causing permanent damage to your printer through ink leakage.
Use a stable USB connection rather than Wi-Fi for service operations. Set Main Absorber: canon service tool v5306
If you're just dealing with refilled ink levels, you might be able to bypass this by holding the Stop/Reset button for 5 seconds without needing the Service Tool. If you are a casual user facing a