Why am I receiving an error when I try to access PSD2 APIs (Account API v1, Account API v3.1.1, Payment API v3.1.1)?

We are using the Modified Customer Interface (MCI) as our TPP access interface. Therefore, to comply with regulations we have decommissioned our PSD2 APIs. These will not be available after 12th March 2020, which is why you might be receiving an error message. More information on our MCI solution and how to register can be found here.