JSON 2.0 Data Protocol Handler not working in DevTest 9.0

Document ID : KB000117050
Last Modified Date : 05/10/2018
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Issue:
A Virtual Service was created using the JSON2.0 DPH.
When deploying this VSM, I am getting the error:
The VSE system cannot find a class required by the VS model.
Please make sure the com.itko.lisa.vse.stateful.protocol.json.JSONDataProtocolHandler2 class is available on the VSE server (maybe by dropping a jar in the hotDeploy directory for the VSE server).
Environment:
DevTest on release 9.x
Cause:
The Virtual Service was created with DevTest Workstation 9.1, where JSON 2.0 DPH is available and deployed to VSE on release 9.0. JSON 2.0 DPH is not available with DevTest 9.0.
Resolution:
Create the Virtual Service using DevTest on release 9.0 or use DevTest VSE on release 9.1.
Mixing and matching versions is not recommended and not supported.