IAM-2050243 : Orchestration process with id 4008, failed with error message IAM-0080062 : Unknown e

Hi I deployed below PreProcessEvent Handler to float some values to UDF attribute. I registered the plugin and then I tested the Event Handler it given me below attached error. Now I unregistered the plugin than also I am getting same error again and again. I even tried to restart server & OIM server both but also issue exist.

Please help how can I sort the issue.

JAVA Code:

package com.bescom.user.eventhandler;

import oracle.iam.platform.context.ContextAware;

import oracle.iam.platform.kernel.vo.BulkEventResult;

import oracle.iam.platform.kernel.vo.BulkOrchestration;

import java.io.Serializable;

import oracle.iam.platform.kernel.vo.EventResult;