Error on loading the Visual Paradigm

Upon loading the Visual paradigm tool in jdevstudio1013, Iam getting the following error:
Severe(2,353): No class def found for addin com.vp.vpuml.jdevintegration.JDeveloperVPUMLAddin

Dear Praveen,

Thank you for your post. I regret that currently we only support up to the 10.1.2 version of Oracle JDeveloper. As I know, our engineers are now working on the support of 10.1.3.

Best Regards,