Error with HA provider from music assistant

Configuration
1

Anybody else seeing this? I upgraded both HA and MA recently, so I’m not sure where the problem lies yet, but it presents as this in the MA logs:

2026-04-07 22:30:50.308 WARNING (MainThread) [music_assistant.webserver] config/providers/reload: 400, message="Duplicate 'Server' header found.", url='wss://homeassistant.example.com/api/websocket'
2

Have you tried a normal power down and restart of all your devices, including your router?
Clear your browser cache as well and reload.

3

Did that just now, and I still have the same problem. I even tried creating a new long-lived access token for Music Assistant.