Error When Sending Discord invite via sendMessage

java.lang.NullPointerException: null
	at sx.blah.discord.api.internal.DiscordUtils.getInviteFromJSON(DiscordUtils.java:109)
	at sx.blah.discord.api.internal.DiscordClientImpl.getInviteForCode(DiscordClientImpl.java:485)
	at sx.blah.discord.api.internal.DispatchHandler.lambda$messageCreate$6(DispatchHandler.java:159)
	at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
	at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1374)
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
	at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
	at sx.blah.discord.api.internal.DispatchHandler.messageCreate(DispatchHandler.java:159)
	at sx.blah.discord.api.internal.DispatchHandler.handle(DispatchHandler.java:43)
	at sx.blah.discord.api.internal.DiscordWS.onWebSocketText(DiscordWS.java:88)
	at org.eclipse.jetty.websocket.common.events.JettyListenerEventDriver.onTextMessage(JettyListenerEventDriver.java:189)
	at org.eclipse.jetty.websocket.common.message.SimpleTextMessage.messageComplete(SimpleTextMessage.java:69)
	at org.eclipse.jetty.websocket.common.events.AbstractEventDriver.appendMessage(AbstractEventDriver.java:66)
	at org.eclipse.jetty.websocket.common.events.JettyListenerEventDriver.onTextFrame(JettyListenerEventDriver.java:158)
	at org.eclipse.jetty.websocket.common.events.AbstractEventDriver.incomingFrame(AbstractEventDriver.java:162)
	at org.eclipse.jetty.websocket.common.WebSocketSession.incomingFrame(WebSocketSession.java:376)
	at org.eclipse.jetty.websocket.common.extensions.ExtensionStack.incomingFrame(ExtensionStack.java:220)
	at org.eclipse.jetty.websocket.common.Parser.notifyFrame(Parser.java:220)
	at org.eclipse.jetty.websocket.common.Parser.parse(Parser.java:256)
	at org.eclipse.jetty.websocket.common.io.AbstractWebSocketConnection.readParse(AbstractWebSocketConnection.java:679)
	at org.eclipse.jetty.websocket.common.io.AbstractWebSocketConnection.onFillable(AbstractWebSocketConnection.java:511)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:273)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95)
	at org.eclipse.jetty.io.ssl.SslConnection.onFillable(SslConnection.java:202)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:273)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95)
	at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93)
	at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:303)
	at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)
	at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589)
	at java.lang.Thread.run(Thread.java:745)
12:45:03.558 [WebSocketClient@14762148-18] INFO  sx.blah.discord.Discord4J - Shard 0 websocket disconnected with status code 1008 and reason "NullPointerException".
12:45:03.558 [WebSocketClient@14762148-18] INFO  sx.blah.discord.Discord4J - Beginning reconnect for shard 0.
12:45:03.559 [WebSocketClient@14762148-18] INFO  sx.blah.discord.Discord4J - Performing reconnect attempt 0.
12:45:04.509 [WebSocketClient@2831957-46] INFO  sx.blah.discord.Discord4J - Websocket Connected.
12:45:04.510 [WebSocketClient@2831957-46] INFO  sx.blah.discord.Discord4J - Reconnect for shard 0 succeeded.
12:45:04.734 [WebSocketClient@2831957-43] INFO  sx.blah.discord.Discord4J - Session resumed on shard 0