The customer could not register the Toolset site key. Even though the domain and key looked correct, the website kept showing that the key was wrong. The site was also running a very old version of Toolset Types.
Solution:
The issue was caused by using an outdated Toolset version. The recommended fix was to manually update the Toolset plugins to the latest version first, and then unregister and register the site again from the Commercial tab using a newly generated site key. This resolves the registration problem on old Toolset installations.
