Mi Box S WiFi not working

[The.GVS]

My Mi Box S was delivered today. I set it up and everything was fine during that time I even streamed a few videos. (This was in the afternoon.) Now in the evening, I wanted to watch YouTube so I opened the app, it would not open and said WiFi not connected. So I opened network settings the WiFi connected on it's own, I came back to YT app it said the same thing again. Every time I open network settings, the page is empty it takes a second to refresh the available networks and connects to my router. I tried connecting to a couple mobile hotspot, the problem persists. In the hotspot settings on my phone it shows that the box is disconnecting and reconnecting again and again. I tried factory resetting it, the problem's still there. Any Idea how I can fix this?

 

Mi Box S

Android 8.1.0

Build: OPM1.171019.011.588

[TheFlyingTraut]

Warranty issue.