Sonoma 14.4.1 Update, Tailscale, and Wordpress

I run my personal, private Wordpress blog on a small Ubuntu server. I access from my MacBook Pro 2019 running Sonoma and my iPad. I use Tailscale to VPN into that server from both the MacBook and the iPad. After the recent upgrade to 14.4.1 I can no longer access via the VPN my Wordpress blog on the MacBook, but can on my iPad. I can, however, access the blog from within my network (I.e., https://192.168.1.XXX/Blog).

As a test I set up a very simple html page on that same server that use PHP to read data from a MySQL database. I can access this webpage from both the MacBook and the iPad.

Both the Wordpress blog and the simple html page use a self-generated encryption certificate.

Anyone have an idea what’s going on? (I didn’t see any clues in the logs.)