From my experience I was able to update my credit card by confirming it first then hitting continue. If you had already confirmed the card info then as a computer technician I would tell you some browsers may not support the continue button. Change your default browser to Edge or Internet Explorer at least temporarily and try again. I at first tried firefox without success then IE still no good then I tried Edge and for some reason that worked. I have not tried Chrome as I did not have it at the time.
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