I have downloaded the Essbase plugin from pdi market place.
Using my credentials, I can successfully log into the essbase server and see all of the cubes.
However, when I try and extract data using MDX query I get the error:

Cannot connect to Provider Server. java.io.InvalidClassException: com.essbase.api.base.EssException; local class incompatible: stream classdesc serialVersionUID = -5333423410207619608, local class serialVersionUID = -3889253203225845868

Please help!