Screenshot not working since 9.1.1
# Bug Report

### Describe the Bug

The screenshot in the Home app does not work. (cf. log)
Roll back on 9.0.0, it does work again.

### To Reproduce
upgrade to 9.1.1

### Expected behavior
obtain screenshot in the Home app and in the notification

### Screenshots/Logs

`[6/10/2020,9:12:16 AM] [Ring] 404 from endpoint https://api.ring.com/clients_api/snapshots/image/5757450
[6/10/2020, 9:12:16 AM] [Ring] Failed to cache snapshot for Door Bell (28.728s), The camera currently reports that is it online
[6/10/2020, 9:12:16 AM] [Ring] Door Bell camera appears to be unable to upload snapshots.  This can happen when your Ring Modes settings prevent motion detection or live view, which also prevents snapshots.  If Modes are not blocking snapshots, this can also happen if the camera has gotten into a bad state, which requires a physical restart of the camera.  If this happens, you will also not be able to retrieve snapshots via the Ring app for this camera.  In that case, please turn off power to this camera by removing its battery or turning off the breaker for the circuit it is wired to.  Once power is cycled, snapshots should start working again.` 

### Additional context
My Ring Doorbell is v1 with battery

### Homebridge Ring Config
Post homebridge-ring platform config  _without sensitive information_
```

{
        "bridge": {
                "name": "Homebridge",
                "username": "xxx",
                "pin": "xxx"
        },

        "description": "HomeBridge Ring",


        "selectiveLoad": true,

        "plugins":  [
                "homebridge-ring"
                 ],

        "platforms": [{
                "platform": "Ring",
                "refreshToken": "xxx",
                "hideInHomeDoorbellSwitch": true,
                "hideCameraMotionSensor": true
        }]
}

```

### Environment

 - OS: macOS 10.12
 - Node.js: v12.16.1
 - NPM: 6.14.5
 - homebridge-ring: 9.1.1 
 - homebridge: 1.1.0
 - hoobs: N/A
