This incident has been resolved. A change has been rolled out to all Authress accounts to revert the problematic functionality and users should again be able to log in at this time.
The Authress Development Credentials are available for accounts to easily get up and running during the early integration with Authress. As usage matures, customers are urged to migrate from using these development credentials to ones owned by Authress Customers.
Authress Development Credentials should not be used in production environments as they are unstable and can be impacted by both the Authress Development Team as well as the provider they are being used with. If you are using Authress provided development credentials with any of your connections and are looking to move to using Customer provided credentials but are unsure how, the instructions for each of the connections are available in the Authress KB: https://authress.io/knowledge-base/docs/authentication/connecting-providers-idp
Or reach out to the Authress Development team via an Authress support ticket.