No implementation found for void myapp.vpn.core.NativeUtils.jniclose(int)

[JerS-vzla]

Hi,
friend I am trying to implement in my project your libraries to connect to a vpn, but I have a problem when including the libraries in the NativeUtils

System.loadLibrary ("stlport_shared");
System.loadLibrary ("opvpnutil");

I get the following error:

12-28 10:29:04.666 5328-6490/? E/art: No implementation found for void myapp.vpn.core.NativeUtils.jniclose(int) (tried Java_myapp_vpn_core_NativeUtils_jniclose and Java_myapp_vpn_core_NativeUtils_jniclose__I)
12-28 10:29:04.668 5328-6490/? E/AndroidRuntime: FATAL EXCEPTION: OpenVPNManagementThread
Process: myapps, PID: 5328
java.lang.UnsatisfiedLinkError: No implementation found for void myapp.vpn.core.NativeUtils.jniclose(int) (tried Java_myapp_vpn_core_NativeUtils_jniclose and Java_myapp_vpn_core_NativeUtils_jniclose__I)
at myapp.vpn.core.NativeUtils.jniclose(Native Method)
at myapp.vpn.core.OpenVpnManagementThread.protectFileDescriptor(OpenVpnManagementThread.java:181)
at myapp.vpn.core.OpenVpnManagementThread.processNeedCommand(OpenVpnManagementThread.java:394)
at myapp.vpn.core.OpenVpnManagementThread.processCommand(OpenVpnManagementThread.java:234)
at myapp.vpn.core.OpenVpnManagementThread.processInput(OpenVpnManagementThread.java:205)
at myapp.vpn.core.OpenVpnManagementThread.run(OpenVpnManagementThread.java:150)
at java.lang.Thread.run(Thread.java:776)