Tell us what you are trying to do?
I've created a new site key for a new development/staging site (premier.tailfishdev.com). Even after I add it to the site's backend, it still says "You are using an unregistered version of Toolset and are not receiving compatibility and security updates. Register now" for Toolset Maps and Toolset Views (which I still use extensively).
Is there any documentation that you are following?
No, but I'm simply creating a site key and entering it into the site. I've done it many many times.
Can you go to the installer debug page and check if the connection is okay and if there are any messages in the log?
Visit the back end at /wp-admin/admin.php?page=otgs-installer-support
The URL for the site key has to be exactly correct, even using http or https.
The preferred way to register a site is from the custom installer page (click "Register" from the list of Toolset plugins) and then use the "Get a key for this site" link (screenshot), which will pass the current URL to toolset.com to generate the correct key.
If using that doesn't work, let me know what you find in the installer debug page.
I can see in our account tool that you registered hidden link yesterday (and that you have over 200 other registered sites, which evidently worked okay).
Something has gone wrong but it's not clear what.
Could I get site credentials from you and I'll try and register your site under my account, and see how that works out?
Let me mark your next reply as private so that I can get log-in credentials from you—you may want to create a temporary admin user for me to use that you can later delete. And be sure to have a current backup of your site.
I've edited the reply to remove the site key, but it actually is useless to anyone else, it is tied to your site url and can't be used anywhere else.
I'm not sure what the problem has been here. I logged in to your site and I went through the steps to register the site against my own account, and that worked without issue.
So I unregistered the site, and then I used the site key from your account and did the same.
It also registered without problem (and is currently registered with your site key).
I can't say what the problem was when you were trying to do it, but I'm sorry for the inconvenience.
It appears to be a server problem: checking the browser console on the registration page it is full of blocked requests (403 permissions errors) when trying to load resources, including JS files that are needed to handle entering and storing the site key.