And it's working for me fine too. It probably would be worth giving somewhat more details rather than a one liner, otherwise all you will get is the unhelpful "it's just you".
Things like cookies and web browser versions are typical causes, so the work arounds are the usual ones, try Incognito or another browser, switch on or off ad-blockers. Have you tried the Executive Club specific app (not the BA app?). Or if it's the EC app try the BA app?