Please check the subscription status of the account you are using. If the account isn't a "Full User" this will cause the 401 error.

• Go to the User tile in Classic.
• Change the subscription status to "expired" and "cancelled" and then Search.
  

If you see the account you're using, get in touch with Support to get it back up and running. You can do this by emailing support@aptem.co.uk or using our Help Centre to raise a ticket at https://support.aptem.co.uk/hc/en-gb