Hi @Chapas and welcome to the forum.
On the odd occasion this has happened to me I find the following procedure gets my puck reconnected:
Put your puck into Standby and then unplug both your puck and router. Leave for a couple of minutes and then plug your router back in and wait for it to completely finish rebooting. Once it has rebooted plug your glass TV back in and when that has also rebooted it should have reconnected to the internet
If that doesn't resolve the issue then have a look at the following link to see if it helps:
https://www.sky.com/help/articles/sky-glass-no-internet-connection-osm
------------------------------------------
If my post (or any other) has solved your issue please mark as an "Answer" as it helps others identify the solution
