Retrieving parked call error

We just started using iSymphony and noticed the ability to retrieve a parked call is failing. I copied the error message below. It occurs on both the desktop client and the web client.

Has anyone else ran into this or have any suggestions on how we may resolve it.

System Information:
FreePBX Distro: 10.13.66-13
Asterisk Version: 11.20.0
iSymphonyV3 Freepbx Module: 4.1.18
iSymphonyV3 Server: 3.3.2.59 Build 59
Java Version:
openjdk version "1.8.0_51"
OpenJDK Runtime Environment (build 1.8.0_51-b16)
OpenJDK 64-Bit Server VM (build 25.51-b03, mixed mode)

Error Message:

There was a problem unparking the call.

com.xmlnamespace.panel.lib.pbx.request.ActionException: Could not find call segment.
at com.xmlnamespace.panel.server.core.asterisk.action.TransferActionHandler.handle(TransferActionHandler.java:141)
at com.xmlnamespace.panel.server.core.asterisk.action.TransferActionHandler.handle(TransferActionHandler.java:109)
at com.xmlnamespace.panel.server.core.asterisk.action.ActionHandler.handleRequest(ActionHandler.java:301)
at com.xmlnamespace.panel.lib.communication.jms.request.JMSRequestServer.handleRequest(JMSRequestServer.java:357)
at com.xmlnamespace.panel.lib.communication.jms.request.JMSRequestServer.handleMessage(JMSRequestServer.java:338)
at com.xmlnamespace.panel.lib.communication.jms.request.JMSRequestServer.access$1(JMSRequestServer.java:327)
at com.xmlnamespace.panel.lib.communication.jms.request.JMSRequestServer$3.onMessage(JMSRequestServer.java:257)
at org.apache.activemq.ActiveMQMessageConsumer.dispatch(ActiveMQMessageConsumer.java:1394)
at org.apache.activemq.ActiveMQSessionExecutor.dispatch(ActiveMQSessionExecutor.java:131)
at org.apache.activemq.ActiveMQSessionExecutor.iterate(ActiveMQSessionExecutor.java:202)
at org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:133)
at org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:48)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)