Symbol not found: _NEHotspotConfigurationErrorDomain

Hi all,

our app uses an iOS 11.0 target.

We have also enabled the following capabilities:

- Access WiFi Information

- Hotspot Configuration

- Network Extension

In our code, we use the "NetworkExtension" framework to connect to a particular Wifi network, but when we run the app in both simulators (any iOS < 13 and) and devices the app crash with the following log:

dyld: Symbol not found: _NEHotspotConfigurationErrorDomain
  Referenced from: /var/containers/Bundle/Application/9708E713-8FB7-4385-B3BD-90EF46453ECD/TheApp.app/TheApp
  Expected in: /System/Library/Frameworks/NetworkExtension.framework/NetworkExtension
 in /var/containers/Bundle/Application/9708E713-8FB7-4385-B3BD-90EF46453ECD/TheApp.app/TheApp
(lldb)

The assembly part (if useful):

dyld`__abort_with_payload:
    0x1027be410 <+0>:  mov    x16, #0x209
    0x1027be414 <+4>:  svc    #0x80
->  0x1027be418 <+8>:  b.lo   0x1027be430               ; <+32>
    0x1027be41c <+12>: stp    x29, x30, [sp, #-0x10]!
    0x1027be420 <+16>: mov    x29, sp
    0x1027be424 <+20>: bl     0x1027bd850               ; cerror_nocancel
    0x1027be428 <+24>: mov    sp, x29
    0x1027be42c <+28>: ldp    x29, x30, [sp], #0x10
    0x1027be430 <+32>: ret   

No idea why this happens.

The use of NEHotspotConfiguration should be available starting from iOS 11 as written in the doc:

https://developer.apple.com/documentation/networkextension/nehotspotconfiguration

These are my 3 lines of code:

import NetworkExtension

func connect()
        let hotspotConfig = NEHotspotConfiguration(ssid: wifiName, passphrase: wifiPassword, isWEP: wep)
        NEHotspotConfigurationManager.shared.apply(hotspotConfig) { (hotSpotError) in
            // [...]
        }
}

Running the app on iOS >= 13 (both device/simulator) works well as usual.

Changing the iOS version to 12.0 makes the app crash like 11.0 version.

Someone can help, please?

thanks

Alberto