Starting from Client version 5.0, you must actively identify the client to your WATS Server or skyWATS.com account.
Enter a valid username and password (same credentials as used to log in to the WATS web application). The user must have access (permission) to register new clients
On Prem: https://virinco.zendesk.com/hc/en-us/articles/207424383-Edit-Roles-Permission
WATS Cloud: Manager and Analyzers have access to register new Clients
For remote installations of clients, you should not distribute your Username and Password. Instead, you can use a Token Key. Add the Token key in the Password field (leave Username blank).