[RN 2.0.1] Error post upgrade: Cannot establish remote XDCR connection, fails with "case_clause,error"

Load 30 items on 181 2 node cluster.
Failover and rebalance out 1 181 node, and rebalance in a 2.0 node
Repeat for Failover and rebalance out 2nd 181 node, and rebalance in a 2.0 node

• Keep continuous sets/deletes on this cluster during rebalance/failovers.

New cluster now has all 2.0 nodes.

Setup a XDCR replication reference to another 2.0 node.

Cannot setup replication to another 2.0 node , reference replication fails with "case clause error"

Server error during processing: ["web request failed",

{path,"/pools/default/remoteClusters"}

,

{type,error}

,
{what,
{case_clause,
{error,

{case_clause,false}

,
[

{ns_config,'-update_key/2-fun-0-',3}

,

{ns_config,handle_call,3}

,

{gen_server,handle_msg,5}

,

{proc_lib,init_p_do_apply,3}]}}},
{trace,
[{menelaus_web_remote_clusters, cas_remote_clusters,2}, {menelaus_web_remote_clusters, do_handle_remote_clusters_post,4}, {menelaus_web,loop,3}, {mochiweb_http,headers,5},{proc_lib,init_p_do_apply,3}

]}] (repeated 1 times)

Logs at