Topic
When using the RPA LE Unlocker for the first time and receiving this message below:

The 'Unlock' Action cannot execute until the Foxtrot Unlocker is registered with Windows. To do so please restart Nintex Bot while logged in a a User with local administrator rights. 

or

The Credential Provider is Not ready to unlock the workstation. Unlocker version 17.16.0

Instructions 
This issue could be due to the Unlocker being installed under a Windows user profile without Admin rights. Since the installer needs permission to write entries to the Registry (which requires Admin privileges), we recommend the following:

*Log in with a local Admin account.
*Uninstall the Unlocker.
*Reinstall it while still logged in as Admin.

If these steps are followed and the issue persists, please open a case with Nintex Support by sending an email to Support@Nintex.com and let us know this is for RPA LE and that you followed this help document to no avail.