アカウントを削除できない(I can't delete my account)

Hello @user5660
as I recall: Japan is an exception regarding Norton Password Manager not requiring an active Norton subscription.

are you Japan location?

Deleting Norton account - Japan
https://support.norton.com/sp/ja/jp/home/current/solutions/v20220512171520504

May be best for you to discuss your Norton account deletion with Norton support.

Norton Community is primarily user-to-user “working” product help.
Norton Community does not have access to your Norton account ~ subscription ~ billing profile.

~ this process [here] works for me to reach: human agent
Norton support via Community | Chat | Phone [here]