SRS-ZR5: error on source + active source not indicated

[Censored3]

I'm getting errors on running songpal source:

WARNING:songpal.service:More than on version for {'name': 'connectBluetoothDevice', 'versions': [{'version': '1.0'}, {'version': '1.1'}]}, using the first one
WARNING:songpal.containers:Got unknowns for Source: {'protocols': ['scalar'], 'upnpOperationInfo': {'uuid': '00000001-0000-1010-8000-8c579b3e2f21', 'containerID': 'usb'}} - please create an issue!
Home Network (dlna:music)
  Got an error for getContentCount: [15, 'unsupported operation']
  Got an error for getContentList: [15, 'unsupported operation']
WARNING:songpal.containers:Got unknowns for Source: {'protocols': ['upnp'], 'upnpOperationInfo': {'uuid': '00000001-0000-1010-8000-8c579b3e2f21', 'containerID': 'usb'}} - please create an issue!
USB (storage:usb1)
  Got an error for getContentCount: [15, 'unsupported operation']
  Got an error for getContentList: [15, 'unsupported operation']
WARNING:songpal.containers:Got unknowns for Source: {'protocols': ['scalar'], 'upnpOperationInfo': {'uuid': '00000001-0000-1010-8000-8c579b3e2f21', 'containerID': 'usb'}} - please create an issue!
WARNING:songpal.containers:Got unknowns for Source: {'protocols': ['scalar'], 'upnpOperationInfo': {'uuid': '00000001-0000-1010-8000-8c579b3e2f21', 'containerID': 'usb'}} - please create an issue!
WARNING:songpal.containers:Got unknowns for Source: {'protocols': ['scalar'], 'upnpOperationInfo': {'uuid': '00000001-0000-1010-8000-8c579b3e2f21', 'containerID': 'usb'}} - please create an issue!
HDMI (exInput:hdmi)
  Got an error for getContentCount: [15, 'unsupported operation']
  Got an error for getContentList: [15, 'unsupported operation']
Bluetooth Audio (extInput:btAudio)
  Got an error for getContentCount: [15, 'unsupported operation']
  Got an error for getContentList: [15, 'unsupported operation']
Audio in (extInput:line)
  Got an error for getContentCount: [15, 'unsupported operation']
  Got an error for getContentList: [15, 'unsupported operation']
WARNING:songpal.containers:Got unknowns for Source: {'protocols': ['scalar'], 'upnpOperationInfo': {'uuid': '00000001-0000-1010-8000-8c579b3e2f21', 'containerID': 'usb'}} - please create an issue!
Cast (cast:audio)
  Got an error for getContentCount: [15, 'unsupported operation']
  Got an error for getContentList: [15, 'unsupported operation']
WARNING:songpal.containers:Got unknowns for Source: {'protocols': ['scalar'], 'upnpOperationInfo': {'uuid': '00000001-0000-1010-8000-8c579b3e2f21', 'containerID': 'usb'}} - please create an issue!
NetService (netService:audio)
  Got an error for getContentCount: [15, 'unsupported operation']
  Got an error for getContentList: [15, 'unsupported operation']

Running songpal input does list a few of the sources, but the active source is not indicated:

Inputs:
  * Bluetooth Audio (uri: extInput:btAudio)
  * Audio in (uri: extInput:line?port=1)
  * HDMI (uri: extInput:hdmi)

I'd love to get this fixed, I would like to read the active source in HA...
Let me know if I can help at all.

my devinfo:
https://gist.github.com/Censored3/4fac9923b5a86540e650599ccb2fb49f

Thanks!

[rytilahti]

See #5, that's likely related.