I did not have a browser issue. However it took me a long time to figure out that my phone app was old. Only noticing it when I logged in with my Android tablet. As Xydocq suggests, maybe clear your browser cache. However if you open an incognito browser and try it there and it doesn't work then clearing the cache will not help. Make sure no other incognito browser is open at the same time. I would try a different browser. I sometimes find that the No Script browser addon will interfere with some sites.
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