PhotonOnPremise and Unity plugin version

I'm investigating a connection issue and would like to rule out a mismatch between the Photon Unity plugin and the photon server version.

Photon server version is:
== Core ==
PhotonSocketServer.2013
x64 Unicode Release
BuildDate: 2016-02-05 13:04:36
Version: 4.0.28.2962
SVN repository: photon-socketserver
SVN revisions of...
... this project: 2962
== SDK ==
BuildDate: 2016-02-08 15:37:16
Version: 4.0.29.11263
SVN repository: photon-socketserver-sdk
SVN revisions of...
... this project: 11263

Unity Photon Plugin was downloaded from:
https://assetstore.unity.com/packages/tools/network/photon-unity-networking-classic-free-1786

Photon3Unity3D.dll version is 4.1.2.6

Should the server and client be compatible?