@Courtney2204 thst means the hub has lost connection to the exchange. Run the connection test in the My Sky app overca mobike connection but ignore the intial report if it says everything is OK which is from the last routine test. Instead click to run the full test which will tell you if Sky are aware of a fault affecting your line. If theyvare not call them to report the issue.
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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
