Resolve the error "We have found a login for your email address but it is not yet registered with (Website name). Please click here and register yourself."

In a One World account customer record can be assigned to a specific subsidiary.

The following can be checked to fix the error message:

1. Ensure that the customer email address was given an access and has a Customer Center Role
2. Check the Subsidiary assigned to the customer record.
3. Navigate to Setup > Site Builder > Setup Website > Edit Site.
4. Ensure that the Subsidiary set to customer record is set to Online.

The error normally is being triggerred, for example,  if a customer record assigned in New Zealand subsidiary attempts to login in the Australian website.