I am still unable to check out in the app or on the website. I have deleted cache, browser history, restarted computer and it won’t let me check out. Getting a 400 page error. I can see my basket but I can’t go any further. Anyone else?

1.Samsung laptop running Windows 11, Firefox v. 142.0 browser (64 bit)
2. Galaxy ZFold5 Android v.15, One UI v.7.0 HSN app v. 169