failed to execute javaapicallout policy in apigee 4.51 edge private cloud

[Sirisha_n]

Getting below error when using javaapicallout policy in apigee 4.51. however it is working okay on other 4.51 environments. Was wondeering if any permissions to the files causing this issue..

Apigee-Main-27 ERROR MESSAGING.FLOW - AbstractAsyncExecutionStrategy$AsyncExecutionTask.logException() : Exception caught
com.apigee.kernel.exceptions.spi.UncheckedException: Failed to execute JavaCallout. Could not initialize class com.fanniemae.sharedservices.evas.VaultFactory
at com.apigee.steps.javacallout.JavaCalloutStepDefinition$SecurityWrappedExecution.execute(JavaCalloutStepDefinition.java:315)
at com.apigee.steps.javacallout.JavaCalloutStepDefinition$CallOutWrapper.execute(JavaCalloutStepDefinition.java:169)
at com.apigee.messaging.runtime.steps.StepExecution.execute(StepExecution.java:157)
at com.apigee.flow.execution.AbstractAsyncExecutionStrategy$AsyncExecutionTask.call(AbstractAsyncExecutionStrategy.java:83)
at com.apigee.flow.execution.AbstractAsyncExecutionStrategy$AsyncExecutionTask.call(AbstractAsyncExecutionStrategy.java:48)
at com.apigee.threadpool.CallableWrapperForMDCPreservation.call(CallableWrapperForMDCPreservation.java:26)
at com.apigee.threadpool.ThreadPoolManager$QueueAwareCallableTask.call(ThreadPoolManager.java:567)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NoClassDefFoundError: Could not initialize class com.fanniemae.sharedservices.evas.VaultFactory
at com.fanniemae.apigee.ApigeeSecretManager.execute(ApigeeSecretManager.java:37)
at com.apigee.steps.javacallout.JavaCalloutStepDefinition$ClassLoadWrappedExecution.execute(JavaCalloutStepDefinition.java:235)
at com.apigee.steps.javacallout.JavaCalloutStepDefinition$SecurityWrappedExecution$1.run(JavaCalloutStepDefinition.java:302)
at com.apigee.steps.javacallout.JavaCalloutStepDefinition$SecurityWrappedExecution$1.run(JavaCalloutStepDefinition.java:300)
at java.security.AccessController.doPrivileged(Native Method)
at com.apigee.steps.javacallout.JavaCalloutStepDefinition$SecurityWrappedExecution.execute(JavaCalloutStepDefinition.java:300)
... 12 common frames omitted