The R letter on that JL083AR probably means Remanufactured: maybe that's the issue.
The JL083A "Aruba 3810M/2930M 4-port 100M/1G/10G SFP+ MACsec Module" looks supported by Aruba 2930M, at least looking at latest Aruba 2930M QuickSpecs.
Edit: Wait...Are you already using the WC.16.04.0004 Software Version on your Aruba 2930M? that version (actually the latest) is mandatory on the Aruba 2930M in order to support the JL083A.