Vivox: What causes VxErrorNotSupported (5018) errors?

VxErrorNotSupported (5018) errors can be caused by the following reasons in older versions of the Vivox SDK:

• Attempting to issue the req_session_set_participant_volume_for_me or req_session_set_local_speaker_volume requests in the Vivox Core SDK.
• Attempting to set the VivoxUnity.IParticipantProperties.LocalVolumeAdjustment property in the Vivox Unity SDK.
• Attempting to use the VivoxCore::ParticipantProperties::SetLocalVolumeAdjustment setter in the Vivox Unreal SDK.

Although present in the Vivox API in older SDKs due to them being on our roadmap, they had not been fully implemented. If you are experiencing these errors, update to at least the Core 5.0.2.32345, Unity 2019.6.21, or Unreal 2019.7.16 SDK versions.