@Shuang In the Advanced > IPTV section there is a checkbox for "Wireless Multicast Forwarding". That was the only thing checked in this section and after unchecking it, it went through a progress bar...

I'm finally able to print over wifi on my Brother MFC-9340CDW printer!!! I am so happy, I've spent hours and hours pouring over forums for a solution. Most of the links just show the hardwired print...