As a user if you user printer very often than you might aware of the printer issue. There might be some big issues which need a expert but some small error can be troubleshoot by the user himself the issues are as follows.
Printer not set as the default printer.
There is no power in the printer.
The ink level in the printer is not up to the level.
https://printers-setup.us/canon-printer-setup.html
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