MultiPlayer Extension Not working

[akshayaroraGS]

/home/SYON.COM/akshay/AndroidStudioProjects/andEngineFirstApp/andengine/src/main/java/org/andengine/extension/multiplayer/protocol/server/SocketServer.java
Error:(122, 102) error: cannot find symbol class IServerListener
where CC is a type-variable:
CC declared in class SocketServer
Error:(122, 59) error: cannot find symbol class ClientConnector
where CC is a type-variable:
CC declared in class SocketServer
Error:(122, 75) error: cannot find symbol class SocketConnection
where CC is a type-variable:
CC declared in class SocketServer
/home/SYON.COM/akshay/AndroidStudioProjects/andEngineFirstApp/andengine/src/main/java/org/andengine/extension/multiplayer/protocol/server/BluetoothSocketServer.java
Error:(128, 120) error: cannot find symbol class IServerListener
where CC is a type-variable:
CC declared in class BluetoothSocketServer
Error:(56, 3) error: constructor Server in class Server<C,CC#2> cannot be applied to given types;
required: IClientConnectorListener,IServerListener<? extends Server<BluetoothSocketConnection,CC#1>>
found: IClientConnectorListener,IBluetoothSocketServerListener<CC#1>
reason: actual argument IBluetoothSocketServerListener<CC#1> cannot be converted to IServerListener<? extends Server<BluetoothSocketConnection,CC#1>> by method invocation conversion
where CC#1,C,CC#2 are type-variables:
CC#1 extends ClientConnector declared in class BluetoothSocketServer
C extends Connection declared in class Server
CC#2 extends ClientConnector declared in class Server
Error:(75, 44) error: getServerListener() in BluetoothSocketServer cannot override getServerListener() in Server
return type IBluetoothSocketServerListener is not compatible with IServerListener<? extends Server<BluetoothSocketConnection,? extends ClientConnector>>
where CC,C are type-variables:
CC extends ClientConnector declared in class BluetoothSocketServer
C extends Connection declared in class Server
Error:Execution failed for task ':andengine:compileReleaseJavaWithJavac'.

Compilation failed; see the compiler error output for details.