I can't do the debug because I currently have the plugin deactivated. I had an old Version 2.3.5 and was required to purchase the upgraded version to update. If I activate the old version it crashes my site. That's why I am trying to register but it won't accept the code which I had confirmed is correct on your website.
Toolset (2.3.5 from the year 2018) is really old version and outdated one as after that we release number of major release and added number of new features.
Before you update the Toolset plugins to latest official release version:
*** Please make a FULL BACKUP of your database and website.***
But before you update any plugin I recommend you to take full backup of your site so in any worst situation you can restore it.
Alternatively - I suggest you should create a staging site first and on staging site you should run update first and once you see everything is ok and working on the staging site then you should go ahead and update it on your production site.
I suggest you should update ALL Toolset plugins manually for now:
*** Please make a FULL BACKUP of your database and website.***
- Deactivate and Delete all Toolset plugins from plugins page:
=> hidden link
- Download ALL the latest Toolset plugins you require from your accounts page:
=> https://toolset.com/account/downloads/
- Upload and activate first Types plugin and then try to register the Types plugin.
=> hidden link
We daily backups of the site and database. We've successfully updated to the newest version of Toolset by manually updating it but still get an error code when we try to register using the site key provided on your website. Can you verify that is the correct site key and active?