Hello arlinelee.
If the error is a "This page may not be safe" or similar error, that is because the printer is unable to update its root certificate (used for network security). Click on your browser's option to view more information, and then click on the option to proceed to the printer's IP address. It should be a gray page displaying the printer's signal strength and link quality (and a handful of other bits of information).
If the error page is the equivalent of "Destination unreachable," then your router is not allowing the wifi communication; refer to the router's documentation and support for directions to correct this type of problem.
If you need immediate assistance with this issue, please contact us using the numbers and information at http://Canon.us/ContactLI
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