pun voice chat not working

Blockquote

I want to integrate voice chat in my multiplayer game made using photon pun2. So for that i used voice chat plugin given by photon but i am getting 4 errors even in the demo project of photon voice chat. What do i do????? error 1- Starting microphone failed: "Error initializing output device. " (60) error 2- [Recorder.Recorder] [PV] MicWrapper: System.NullReferenceException: Object reference not set to an instance of an object at Photon.Voice.Unity.MicWrapper..ctor (System.String device, System.Int32 suggestedFrequency, Photon.Voice.ILogger logger) [0x00111] in E:\PunVoice\Assets\Photon\PhotonVoice\PhotonVoiceApi\Platforms\Unity\MicWrapper.cs:44 error 3 - [Recorder.Recorder] Unity microphone input source creation failure: System.NullReferenceException: Object reference not set to an instance of an object at Photon.Voice.Unity.MicWrapper..ctor (System.String device, System.Int32 suggestedFrequency, Photon.Voice.ILogger logger) [0x00111] in E:\PunVoice\Assets\Photon\PhotonVoice\PhotonVoiceApi\Platforms\Unity\MicWrapper.cs:44 . error 4- [Recorder.Recorder] Local input source setup and voice stream creation failed. No recording or transmission will be happening. See previous error log messages for more details.