@Seojoon if other streaming apps are working its an issue with the app if its a Sky Stream/Glass unit try the Refresh Pps function in the Reset section of the settings. If its a non Sky device contact Netflix support.https://help.netflix.com/en
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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
