Unable to create AdminNamespace java.lang.NoClassDefFoundError logging into iManager

We have a NetWare server that has been updated to SP8, but was roll backed to SP7 because of some Library software

I found TID 3572391 but I am unable to find the NW65SP6 download so that I can pull the JCLIENT.JAR and the customer has said that they have tried this solution, but I would also like to try this for myself, any ideas as to what else might be causing this issue, or what else can be tried, would installing iManager 2.7 help? Could an iManager issue also be causing NetStorage to be unable to log in?