MMM-voice-control speech recognition error..

[weaklion]

When i run magic mirror,it does not recognize the microphone.
Npm start dev, an error messeage appeared.

SpeechRecognitionError {error: “network”, message: “”, type: “error”, target: SpeechRecognition, currentTarget: SpeechRecognition…}
bubbles:false
cancelBubble:false
cancelable:false
composed:false
currentTarget:
SpeechRecognition
defaultPrevented:false
error:“network"
eventPhase:0
message:”"
path:Array[0]
returnValue:true
srcElement:SpeechRecognition
target:SpeechRecognition
timeStamp:9665.535
type:“error”

I want to get solution.please…