I have been using Cookie Password Protection on my website for years, and currently have v2.9 installed. I have never had a problem with it but today, when I go to my site I see the following...
This site do not have a valid license key for Cookie Password Protection because of:
Please contact the site owner for more information.
I haven't changed anything recently and the key that I purchased and has worked for years is still showing on the settings.php page as it should.