have error in getVideoDevices connectycube in react-native-webrtc

Question

i wrote this code :

getVideoDevices() { 
    return new Promise((resolve, reject) => { 
           ConnectyCube.videochat.getMediaDevices('videoinput').then(devices => { 
           devices ? resolve(devices) : reject(); 
          }); 
    });
 }

but i have this error in console:

TypeError: undefined is not an object (evaluating 'b.enumerateDevices')

all of permission such as camera and microphone set