Has the list of avatars changed?

I'm using the InteractiveDemo on GitHub, but getting the error

InteractiveAvatar.tsx:102 
        
      
       POST https://api.heygen.com/v1/streaming.new 400 (Bad Request)

InteractiveAvatar.tsx:117 Error starting avatar session: TypeError: Cannot read properties of undefined (reading 'close')
    at StreamingAvatarApi.<anonymous> (StreamingAvatarApi.js:561:45)
    at step (StreamingAvatarApi.js:61:23)
    at Object.throw (StreamingAvatarApi.js:42:53)
    at rejected (StreamingAvatarApi.js:34:65)

I tried looking at the list of avatars in case but I'm getting the following

% curl --request GET \
     --url https://api.movio.la/v1/avatar.list \
     --header 'accept: application/json' \
     --header 'x-api-key: <here is my key>'
<html>
<head><title>503 Service Temporarily Unavailable</title></head>
<body>
<center><h1>503 Service Temporarily Unavailable</h1></center>
</body>
</html>

I'm aware there was an issue a few hours, which was resolved, but now it's not working again...