java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.Throwable.getMessage()' on a null object reference

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Attempt to invoke virtual method 'java.lang.String java.lang.Throwable.getMessage()' on a null object reference
java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.Throwable.getMessage()' on a null object reference	at com.couchbase.todolite.Application.changed(Application.java:223)	at com.couchbase.lite.replicator.Replication.changed(Replication.java:425)	at com.couchbase.lite.replicator.ReplicationInternal$13.run(ReplicationInternal.java:1262)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:428)	at java.util.concurrent.FutureTask.run(FutureTask.java:237)	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:272)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)	at java.lang.Thread.run(Thread.java:761)