Chromecast problem


Why is my new Chromecast showing no server??? Why is this and what do I need to do to fix it?


I’ve never seen that before, can you take a picture?

See if you can answer any or all of these questions:
Has the Chromecast ever worked?
Are you getting the message during the initial Chromecast setup and connection to your router? Or is it happening when you try to cast from a website?
Does it happen on all websites?
Does it make a difference if you try to cast the tab rather than the video player?