Bike Forums - How to stop getting pestered about my subscription?

I've been getting dunning emails from BF recently that my subscription was about to expire. A few minutes ago I got a message telling me my subscription had expired. Looking on PayPal, I see that I auto-payed for another year nearly a month ago, on October 5th:

https://cimg6.ibsrv.net/gimg/bikefor...059f68ec85.png

Furthermore, the email tells me to check my private messages at a bikeforums.net URL I can't reach:

Dear smontanaro,

You have received a new private message at Bike Forums from Forum Alert, entitled "Paid Subscription Expired Notice".

To read the original version, respond to, or delete this message, you must log in here:
http://stg1.bikeforums.net/private.php

This is the message that was sent:
***************
Dear smontanaro,

Your access to the paid subscription "Premium Membership" has expired.

If you have selected a recurring subscription you will be automatically billed for the renewal, else to renew this subscription you must visit http://stg1.bikeforums.net/payments.php

All the best,
Bike Forums
***************

Again, please do not reply to this email. You must go to the following page to reply to this private message:
http://stg1.bikeforums.net/private.php

Looking at the Received headers in the mail I received, it seems like the message really did originate within BF or Internet Brands:Received: from stg-mxout1.internetbrands.com ([98.158.206.104])
by mx.google.com with ESMTPS id i19-20020a9d4a93000000b00661d302c9e3si12729952otf.273.2022.11.01.15.49.21
for <skip.montanaro@gmail.com>
(version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);
Tue, 01 Nov 2022 15:49:21 -0700 (PDT)
Received-SPF: pass (google.com: domain of contactus@bikeforums.net designates 98.158.206.104 as permitted sender) client-ip=98.158.206.104;
Authentication-Results: mx.google.com;
spf=pass (google.com: domain of contactus@bikeforums.net designates 98.158.206.104 as permitted sender) smtp.mailfrom=contactus@bikeforums.net
Received: from stg-bikeforums-web1.internetbrands.com (unknown [10.161.129.5]) by stg-mxout1.internetbrands.com (Postfix) with ESMTP id 649244DF5A41 for <skip.montanaro@gmail.com>; Tue,
1 Nov 2022 15:49:21 -0700 (PDT)
Received: by stg-bikeforums-web1.internetbrands.com (Postfix, from userid 48) id 62DC275C4; Tue,
1 Nov 2022 15:49:21 -0700 (PDT)

I visited my normal private messages but saw no unread messages. I hate to seem alarmist, but is there a problem? Why would legitimate BF adminstrative mail reference a nonexistent URL?