Null pointer exception when trying to get ReplicationSlotInfo on Postgres Debezium Connector

java.lang.NullPointerException
	at io.debezium.connector.postgresql.connection.PostgresConnection.getReplicationSlotInfo(PostgresConnection.java:141)
	at io.debezium.connector.postgresql.PostgresConnectorTask.start(PostgresConnectorTask.java:96)
	at io.debezium.connector.common.BaseSourceTask.start(BaseSourceTask.java:49)
	at org.apache.kafka.connect.runtime.WorkerSourceTask.execute(WorkerSourceTask.java:198)
	at org.apache.kafka.connect.runtime.WorkerTask.doRun(WorkerTask.java:175)
	at org.apache.kafka.connect.runtime.WorkerTask.run(WorkerTask.java:219)
	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)