WiFi dropping , light on WiFi hub only lit on power

[MissF]

Hi my WiFi keeps dropping and the light on the hub only stays green for power. When I run the health check it says al everything is good while none of my devices connected are working. The status on my iPhone says no connection and o couldn't use the WiFi for work as it kept disconnecting every 5 mins is there an issue going around as it's been like this for the last 2 days.