Hi @Owen,
My guess is that your app is fine if it connects to your environment. The event broker has different ways to configure basic authentication, RADIUS being one of them. You’ll need to follow-up with the customer and have them check on the RADIUS profiles configured and make sure they aren’t shutdown. Here is some info from docs that shows how to configure RADIUS: Configuring RADIUS Authentication
Note that caution in yellow/orange:
When you shut down a RADIUS profile, all users and/or clients attempting to authenticate using the RADIUS profile will fail until it is enabled again .
Hope that helps!