@Fiona125 do other streaming apps work on the TV or streaming device affected? Is this a new connection or one that has just stopped working? If replying it would help including the makecand model of device affected and the colour of your Sky hub.
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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
