I'm experiencing the same problem when I go to register my Samsung products. I hope this issue isn't still going on from October last year. I've tried 2 different browsers on my PC and also tried on my phone. It doesn't look good when a technology company can't get it's product registration portal to work.
Both https://www.samsung.com/uk/members/#/not-logged-in and https://my-samsung.com/ie/mysamsung/#/not-logged-in are working for me.
Which link are you trying? And whereabouts in the world are you based?
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