@Sharon1507 a red light is never a good sign. If the red light is on the fibre ONT on the wall which connects to your hub that means the gibre connection is down so needs to be reported to Sky so they can get it fixed.
This link explains what the various leds on your hub indicate https://www.sky.com/help/articles/hub-lights-explained-start
=========================================================
65inch Sky Glass, 3 Sky Streaming Pucks, Sky Ultrafast + and Sky SR213(white Wifi Max hub) main Wifi from 3 TP-Link Deco M4 units in access point mode
