How can I re-enter my current subscription activation key for Norton 360 Deluxe?

Note: Please do not post Personally Identifiable Information like email address, personal phone number, physical home address, product key etc.

Issue abstract:
Norton 360 Deluxe says my subscription expired today but I still have 230 days remaining. How can I re-enter my current activation key?
Detailed description:

Product & version number:

OS details:

What is the error message you are seeing?

If you have any supporting screenshots, please add them:

Open the classic Norton interface by right clicking the Norton icon in the System tray, then click on Open Norton 360. Then click on Help > Subscription Status at the bottom right. That should connect to the Norton Subscription servers to sync your product with your Account.

If that does not help, access the Help page again and click on Enter Product Key.