You will be able to enable the camera and microphone through the device settings.
1. Settings Menu.
1.1 open the Settings on your device.
1.2 scroll to the list of apps at the bottom of the left hand menu and tap the correct app icon.
1.3 you should now see the permissions for the camera or microphone - toggle the switch to Green.
2. Privacy Menu
2.1 open the Settings on your device.
2.2 select Privacy from the left hand menu.
2.3 then select Camera or Microphone
you should see a list of the apps on your device that have access.
2.4 choose the correct app and toggle the switch to Green.