change the192.168.50.1 ---> 192.168.1.1 (192.168.1.1 which I'm assuming is what it says if you checked your Ethernet LAN IP, which they should look the same. if it is not 192.168.1.1, then just change it to whatever it says.) save the settings and give the router a reboot. confirm your Ethernet can still hit the internet and see if your WiFi devices all got a fresh IP address in the 192.168.1.X network.