{"msg":"Fence: onClientEventRegionState, invalid state", "regionState":"0"} in ios
<p>I want to notify the user when he/she reached to a particular floor by using estimote beacons. To do my task I developed my code like below:</p>

<pre><code>func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -&gt; Bool {
    // Override point for customization after application launch.

    self.beaconManager.delegate = self

    self.beaconManager.requestAlwaysAuthorization()
    let firstFloorRegion = CLBeaconRegion(
        proximityUUID: uuid,
        major: 2, identifier: "")
    firstFloorRegion.notifyOnEntry = true
    firstFloorRegion.notifyOnExit = true
    firstFloorRegion.notifyEntryStateOnDisplay = true
    self.beaconManager.startMonitoring(for: firstFloorRegion)
    self.beaconManager.requestState(for: firstFloorRegion)

    return true
}
func beaconManager(manager: AnyObject, didDetermineState region: CLBeaconRegion) {

    NSLog("didDetermineState Called")
}
private func beaconManager(manager: AnyObject, didEnterRegion region: CLBeaconRegion) {

    NSLog("DidEnterRegion Called")
}
private func beaconManager(manager: AnyObject, didExitRegion region: CLBeaconRegion) {

    NSLog("didExitRegion Called")
}
</code></pre>

<p>for a few days it worked perfectly. But from last 2 days onwards its showing the error in xcode console like this:</p>

<blockquote>
  <p><strong>[Client] {"msg":"Fence: onClientEventRegionState, invalid state", "regionState":"0"}</strong>.</p>
</blockquote>

<p>I can't understand what it means. I didn't find any solution in internet also. Help me to get out of it.</p>