Welcome to the Canon forum!
So that the Community can help you better, we will need to know what is the printer model, which operating system is running on your computer (i.e. Windows or macOS and which version). What is the exact error message? How are you connecting? Any other details you'd like to give will only help the Community better understand your issue. The forum is not intended for immediate support. If this is a time-sensitive matter, click HERE search our knowledge base or find additional support options HERE
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