Anybody know the way I repair this?

For some cause, it received't hook up with the WiFi however solely within the night. It's effective all day and immediately it's buggered. It's been doing it for a pair weeks now. I'm within the attic however like I mentioned, it's been effective all day. Simply took it downstairs and it was completely effective. It's tried unplugging all the things from it and leaving it for a bit and it made no distinction. I've additionally tried going offline and organising the wi-fi WiFi once more, nothing. Our WiFi is fairly first rate so I've no clue. Possibly connecting it wired would assist? I'm not an Xbox tech genius so I don't know what to attempt. It's an Xbox One S. Any assistance is appreciated 👍