Zenworks suite upgrade from 11.4.0 to 2017

We are upgrading and are stuck with this error loading zman.  Error: A JNI error has occurred, please check your installation and try again.  Exception in thread "main" java.lang.UnsupportedClassVersionError: com/novell/zenworks/zman/ZManLoader : Unsupported major.minor version 52.0

The database has upgraded and it appears the runtime environment has updated but the zenworks server has not.  So stuck partially in limbo.  Any ideas would be appreciated.