"Error happened during synchronization" while updating version from 4.1.0 to 4.2.1

[rashanjyot]

The stack-trace below is of the error that occurred when I updated the version of stitch-android-sdk from 4.1.0. to 4.2.1.

error happened during synchronization:
java.lang.IllegalStateException: state should be: open
at com.mongodb.assertions.Assertions.isTrue(Assertions.java:70)
at com.mongodb.embedded.client.EmbeddedCluster.selectServer(EmbeddedCluster.java:78)
at com.mongodb.binding.ClusterBinding$ClusterBindingConnectionSource.(ClusterBinding.java:99)
at com.mongodb.binding.ClusterBinding$ClusterBindingConnectionSource.(ClusterBinding.java:95)
at com.mongodb.binding.ClusterBinding.getReadConnectionSource(ClusterBinding.java:82)
at com.mongodb.operation.OperationHelper.withConnection(OperationHelper.java:395)
at com.mongodb.operation.CountOperation.execute(CountOperation.java:234)
at com.mongodb.operation.CountOperation.execute(CountOperation.java:66)
at com.mongodb.client.internal.MongoClientDelegate$DelegateOperationExecutor.execute(MongoClientDelegate.java:179)
at com.mongodb.client.internal.MongoCollectionImpl.executeCount(MongoCollectionImpl.java:248)
at com.mongodb.client.internal.MongoCollectionImpl.count(MongoCollectionImpl.java:183)
at com.mongodb.client.internal.MongoCollectionImpl.count(MongoCollectionImpl.java:177)
at com.mongodb.stitch.core.services.mongodb.remote.sync.internal.NamespaceSynchronizationConfig.getStaleDocumentIds(NamespaceSynchronizationConfig.java:199)
at com.mongodb.stitch.core.services.mongodb.remote.sync.internal.DataSynchronizer.syncRemoteToLocal(DataSynchronizer.java:559)
at com.mongodb.stitch.core.services.mongodb.remote.sync.internal.DataSynchronizer.doSyncPass(DataSynchronizer.java:513)
at com.mongodb.stitch.core.services.mongodb.remote.sync.internal.DataSynchronizerRunner.run(DataSynchronizerRunner.java:61)
at java.lang.Thread.run(Thread.java:764)

Background:
I had a fully functional code utilising stitch-android-sdk v4.1.0. In order to add completion listener to syncMany(), I updated it to v4.2.1. However, this error was reported due to which synchronization could not be done. Also, I tried updating to different versions (v4.3.0 and v4.4.1) just in case, but the same error persisted.

Information that may be relevant: (However, the same information was logged while using previous version that worked fine)

1. NETWORK [initandlisten] Sessions collection is not set up; waiting until next sessions refresh interval: The field 'expireAfterSeconds' is not valid for an index specification. Specification: { key: { lastUse: 1 }, name: "lsidTTLIndex", expireAfterSeconds: 1800 }
2. NETWORK [initandlisten] received client metadata from :27017 embedded: { driver: { name: "mongo-java-driver|embedded", version: "3.9.0" }, os: { type: "Linux", name: "Linux", architecture: "armv8l", version: "3.18.14-13908947" }, platform: "Java/The Android Project/0.9" }