Drive Offline error message

Hi All,

On my iPhone I get the Drive Offline message. On home WiFi network, on 4G. App is latest version, (I have deleted it and reinstalled). iOS is latest version…sometimes though when I restart the app, go into settings, delete WDMyCloud and reinstall it I get in no problem…I can’t reinstall the device every time I want to access it…can anyone help with a fix?

It essentially renders the App useless.

Many thanks

Have also got into my Network settings and the ports are 80 & 443 (as others have posted earlier)…thanks again