Cookies Are Not Enabled Error on Existing Website (Custom Domain, Premium Hosting)

Thank you for clarifying that the email and cookie issue are unrelated. However, my actual problem is that visitors are being redirected to sv101.ifastnet.com/cookies.html even though cookies are enabled. The issue affects multiple users and devices, including Chrome. The website has been working fine for a long time and no major changes were made before this started happening. Also, this account is on a paid Starter Hosting plan, not a free hosting account, so I don’t believe the free hosting hits limit article applies to this situation. Could someone please help identify why the cookie verification is failing or what can be done to resolve it?