Problem watching NTV on laptop

[ifonly]

WE have a new (ish) laptop and at the weekend I wanted to watch NTV (we are with MM) in the garden. So I signed out of the desktop NTV and then signed in on the laptop. But I cannot watch any channels - the circle just keeps spinning and then "Server times out" message appears. We sometimes get " Cannotload M3U8:unable to fetch HTTP resource over HTTPS" message then the "Server time out" message comes up.
Have tried various browsers (which is what MM/NTV advised us) but still no joy at all. But it is working ok on the desk top (which is connected to tv). It is also the same (not now watchable) on an older laptop which we used to regularly watch NTV on.
Anyone else had this problem and if so how did you resolve it ?