If you find that your printer is invisible on your network when connected to your TP-Link WiFi plug one quick fix that sometimes works is to swap the nearest Wifi Powerline Adapter with another. Obviously they both need to be paired on the same powerline link and have cloned the same WiFi credentials. This worked on two installations where multiple adapters were in use and might possibly be related to incompatible software versions in their firmware – as they had been purchased some time apart.