We have an ImageClass MF242dw monochrome printer. It has been working well for several months, but this morning, after printing several documents, it had an error message "Changed IP Address". This has happened before and we have been able to correct by either restarting the printer or the PC or by reconfirming that the PC's were on the same WiFi. This time it did not work. We then tried checking the WiFi SSID the printer was connecting. For over an hour it would not show our network in the list of available SSID's, and then after a restart it would show. Finally got it to connect to the same network as our PC's. Still errors out. Tried rerunning the Canon MF setup utility that I downloaded from the support site, this one dated 12/19/21 (approximately). It will not find the printer when it searches for a device. I am baffled. Is it not really connected even though the SSID setup on the printer said it was "Connected" when I entered the password?
The issue you are describing would point to a poor network connection or something blocking the setup. We would be happy to assist with the issue. To provide some feedback or some troubleshooting steps, we would need some additional information. If you could reply to this message with the information below, we can provide some assistance.