Wi-Fi Connection is unavailable during the initial setup. - If the wireless router has the option for "Client Separation", disabling this option may help . To determine if your router has this option and for instructions on how to disable it, refer to the user manual for your router, or contact your router's manufacturer.
If you experience a 6901 or 6910 error on your printer, disabling IPv6 may help resolve the error. ... From the HOME screen, tap the Wi-Fi icon at the lower left corner of the screen.