Problem
My domain is inaccessible and the domain's name servers (NS) have changed.
Scope
Limited to domain administration only.
Analysis
There is an email from the registrar regarding domain "Verification" sent by WHOIS Verification (ICANN requirements). If the verification process is missed, your domain will be forcibly changed by the registrar, resulting in the loss of access to the domain and website.
Solution
Please check the email address of the person in charge or the contact admin for the domain. There is an official link from the registrar that requires you to click the verification link to maintain domain access. Check your INBOX, SPAM, or JUNK folder.