Error Loading Priv Module: Meterpreter Session

Hey,
I'm new to hacking and have recently been experimenting on metasploit.
I want to get privilege escalation on the android meterpreter session opened.
But I keep getting the error

Failed to load extension: no module of the name extserverpriv.jar found

Can someone please explain me the issue and what can I do to load the module.
Thnx is advanced!
And sorry for my poor English