Cannot connect on android

[hhacker1999]

W/System.err(16211): android.os.RemoteException: You must select a User certificate
W/System.err(16211): at de.blinkt.openvpn.OpenVpnApi.startVpnInternal(OpenVpnApi.java:36)
W/System.err(16211): at de.blinkt.openvpn.OpenVpnApi.startVpn(OpenVpnApi.java:26)
W/System.err(16211): at de.blinkt.openvpn.VPNHelper.connect(VPNHelper.java:87)
W/System.err(16211): at de.blinkt.openvpn.VPNHelper.startVPN(VPNHelper.java:54)
W/System.err(16211): at de.blinkt.openvpn.VPNHelper.startVPN(VPNHelper.java:69)
W/System.err(16211): at id.laskarmedia.openvpn_flutter.OpenVPNFlutterPlugin.lambda$onAttachedToEngine$0$OpenVPNFlutterPlugin(OpenVPNFlutterPlugin.java:124)
W/System.err(16211): at id.laskarmedia.openvpn_flutter.-$$Lambda$OpenVPNFlutterPlugin$MYzEvF67BUjl9cSM6FJLspBJmSI.onMethodCall(Unknown Source:2)
W/System.err(16211): at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:262)
W/System.err(16211): at io.flutter.embedding.engine.dart.DartMessenger.invokeHandler(DartMessenger.java:295)
W/System.err(16211): at io.flutter.embedding.engine.dart.DartMessenger.lambda$dispatchMessageToQueue$0$DartMessenger(DartMessenger.java:319)
W/System.err(16211): at io.flutter.embedding.engine.dart.-$$Lambda$DartMessenger$TsixYUB5E6FpKhMtCSQVHKE89gQ.run(Unknown Source:12)
W/System.err(16211): at android.os.Handler.handleCallback(Handler.java:938)
W/System.err(16211): at android.os.Handler.dispatchMessage(Handler.java:99)
W/System.err(16211): at android.os.Looper.loop(Looper.java:223)
W/System.err(16211): at android.app.ActivityThread.main(ActivityThread.java:7656)
W/System.err(16211): at java.lang.reflect.Method.invoke(Native Method)
W/System.err(16211): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
W/System.err(16211): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)

Same config works on other clients

[ismailcaakir]

Did it work on iOS devices?

[nizwar]

I've answer this on #63 (with relevant question)