Issue with Elasticsearch Connector 4.0

NOTE version: curl localhost:8092
{“couchdb”:“Welcome”,“version”:“v4.5.1-60-g3cf258d”,“couchbase”:“5.0.0-3519-enterprise”}

Elastic search “version” : {
“number” : “6.6.1”,
“build_flavor” : “default”,
“build_type” : “deb”,
“build_hash” : “1fd8f69”,
“build_date” : “2019-02-13T17:10:04.160291Z”,
“build_snapshot” : false,
“lucene_version” : “7.6.0”,
“minimum_wire_compatibility_version” : “5.6.0”,
“minimum_index_compatibility_version” : “5.0.0”
},

I am getting errors like these – is it not able to read the data in my bucket ?
Please help with what could be the problem

22:48:35.022 [nioEventLoopGroup-5-11] INFO c.c.c.d.c.DcpChannel - Connect attempt to xxxxxdb3/10.0.0.10:11210 failed.
javax.security.sasl.SaslException: Could not decode attributes from server message “{“error”:{“context”:“An exception occurred”,“ref”:“86364e98-b96b-42d8-95ca-b6ae762d23b4”}}”
at com.couchbase.client.core.security.sasl.ShaSaslClient.evaluateChallenge(ShaSaslClient.java:122) ~[core-io-1.6.1.jar:?]
at com.couchbase.client.dcp.transport.netty.AuthHandler.handleAuthResponse(AuthHandler.java:133) ~[dcp-client-0.19.0.jar:?]
at com.couchbase.client.dcp.transport.netty.AuthHandler.channelRead0(AuthHandler.java:113) ~[dcp-client-0.19.0.jar:?]
at com.couchbase.client.dcp.transport.netty.AuthHandler.channelRead0(AuthHandler.java:55) ~[dcp-client-0.19.0.jar:?]
at com.couchbase.client.deps.io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105) ~[core-io-1.6.1.jar:?]
at com.couchbase.client.deps.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:356) [core-io-1.6.1.jar:?]
at com.couchbase.client.deps.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:342) [core-io-1.6.1.jar:?]
at com.couchbase.client.deps.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:335) [core-io-1.6.1.jar:?]
at com.couchbase.client.deps.io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:312) [core-io-1.6.1.jar:?]
at com.couchbase.client.deps.io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:286) [core-io-1.6.1.jar:?]
at com.couchbase.client.deps.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:356) [core-io-1.6.1.jar:?]
at com.couchbase.client.deps.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:342) [core-io-1.6.1.jar:?]
at com.couchbase.client.deps.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:335) [core-io-1.6.1.jar:?]
at com.couchbase.client.deps.io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1304) [core-io-1.6.1.jar:?]
at com.couchbase.client.deps.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:356) [core-io-1.6.1.jar:?]
at com.couchbase.client.deps.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:342) [core-io-1.6.1.jar:?]
at com.couchbase.client.deps.io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:921) [core-io-1.6.1.jar:?]
at com.couchbase.client.deps.io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:135) [core-io-1.6.1.jar:?]
at com.couchbase.client.deps.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:646) [core-io-1.6.1.jar:?]
at com.couchbase.client.deps.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:581) [core-io-1.6.1.jar:?]
at com.couchbase.client.deps.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:498) [core-io-1.6.1.jar:?]
at com.couchbase.client.deps.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:460) [core-io-1.6.1.jar:?]
at com.couchbase.client.deps.io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:131) [core-io-1.6.1.jar:?]
at com.couchbase.client.deps.io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) [core-io-1.6.1.jar:?]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_151]
Caused by: java.lang.IllegalArgumentException: the input string is not according to the spec
at com.couchbase.client.core.security.sasl.ShaSaslClient.decodeAttributes(ShaSaslClient.java:363) ~[core-io-1.6.1.jar:?]
at com.couchbase.client.core.security.sasl.ShaSaslClient.evaluateChallenge(ShaSaslClient.java:120) ~[core-io-1.6.1.jar:?]
… 24 more