I don't know why the error message appears.

Error message :

Error: Object reference not set to an instance of an object
UnityEngine.Debug:LogError (object)
VivoxUnity.VxUnityInterop/<VivoxUnityRun>d__6:MoveNext () (at Library/PackageCache/com.unity.services.vivox@15.1.170000-pre.1/Runtime/VivoxUnity/VxUnityInterop.cs:86)
UnityEngine.SetupCoroutine:InvokeMoveNext (System.Collections.IEnumerator,intptr)


why!!!!

When you send a text message or do a tts test, the error message appears on the Unity console.