While Sample (05) with MongoDB persistence data binding issue

When trying to run Sample 05 from current master branch with MongoDB persistence
Added in Line 18 of Main class
`module.usePersistence(MongoPersistenceService.configure("mongodb://localhost:27017/jworkflow"));`
I get the following exception:

```
java.lang.ClassCastException: class java.util.LinkedHashMap cannot be cast to class net.jworkflow.kernel.models.ExecutionPointer (java.util.LinkedHashMap is in module java.base of loader 'bootstrap'; net.jworkflow.kernel.models.ExecutionPointer is in unnamed module of loader 'app')
at java.base/java.util.stream.MatchOps$1MatchSink.accept(MatchOps.java:90)
at java.base/java.util.ArrayList$ArrayListSpliterator.tryAdvance(ArrayList.java:1602)
at java.base/java.util.stream.ReferencePipeline.forEachWithCancel(ReferencePipeline.java:127)
at java.base/java.util.stream.AbstractPipeline.copyIntoWithCancel(AbstractPipeline.java:502)
at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:488)
at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
at java.base/java.util.stream.MatchOps$MatchOp.evaluateSequential(MatchOps.java:230)
at java.base/java.util.stream.MatchOps$MatchOp.evaluateSequential(MatchOps.java:196)
at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.base/java.util.stream.ReferencePipeline.allMatch(ReferencePipeline.java:533)
at net.jworkflow.kernel.models.WorkflowInstance.isBranchComplete(WorkflowInstance.java:113)
at net.jworkflow.primitives.While.run(While.java:34)
at net.jworkflow.kernel.services.DefaultWorkflowExecutor.execute(DefaultWorkflowExecutor.java:80)
at net.jworkflow.kernel.services.WorkflowWorker.executeItem(WorkflowWorker.java:45)
at net.jworkflow.kernel.services.QueueWorker.run(QueueWorker.java:41)
at net.jworkflow.kernel.services.QueueWorker.lambda$start$0(QueueWorker.java:53)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
at java.base/java.lang.Thread.run(Thread.java:832)
```

Do I need to specify additional Jackson "hints" do get the marshalling working with MongoDB?
Thanks in advance.