[CBBS] cluster_run/cluster_connect does not work with 2 nodes (both using cbbs)

[ns_server:error,2021-11-23T18:51:34.323Z,n_0@127.0.0.1:ns_heart_slow_status_updater<0.499.0>:ns_heart:grab_one_service_status:409]Failed to grab service backup status: {exit,

                                       {timeout,

                                        {gen_server,call,

                                         ['service_agent-backup',get_status,

                                          2000]}},

                                       [{gen_server,call,3,

                                         [{file,"gen_server.erl"},{line,247}]},

                                        {ns_heart,grab_one_service_status,1,

                                         [{file,"src/ns_heart.erl"},

                                          {line,406}]},

                                        {ns_heart,

                                         '-grab_service_statuses/0-lc$^1/1-1-',

                                         1,

                                         [{file,"src/ns_heart.erl"},

                                          {line,402}]},

                                        {ns_heart,current_status_slow_inner,

                                         0,

                                         [{file,"src/ns_heart.erl"},

                                          {line,276}]},

                                        {ns_heart,current_status_slow,1,

                                         [{file,"src/ns_heart.erl"},

                                          {line,235}]},

                                        {ns_heart,slow_updater_loop,0,

                                         [{file,"src/ns_heart.erl"},

                                          {line,229}]}]}

2021/11/23 18:51:09 revrpc: Got error (Need 200 status!. Got {500 Internal Server Error 500 HTTP/1.1 1 1 map[Cache-Control:[no-cache,no-store,must-revalidate] Content-Length:[44] Content-Type:[application/json] Date:[Tue, 23 Nov 2021 18:51:08 GMT] Expires:[Thu, 01 Jan 1970 00:00:00 GMT] Pragma:[no-cache] Server:[Couchbase Server] X-Content-Type-Options:[nosniff] X-Frame-Options:[DENY] X-Permitted-Cross-Domain-Policies:[none] X-Xss-Protection:[1; mode=block]] 0xc000159540 44 [] true false map[] 0xc00018e000 <nil>}) and will retry in 1s

...

2021-11-23T18:51:09.477Z INFO (Main) Running node version backup-0.0.0-0000-bd0ebcd with options: -http-port=7100 -grpc-port=7200 -https-port=17100 -cert-path=/home/couchbase/Projects/couchbase-build/ns_server/data/n_0/config/certs/chain.pem -key-path=/home/couchbase/Projects/couchbase-build/ns_server/data/n_0/config/certs/pkey.pem -ca-path=/home/couchbase/Projects/couchbase-build/ns_server/data/n_0/config/certs/ca.pem -ipv4=required -ipv6=optional -cbm=/home/couchbase/Projects/couchbase-build/install/bin/cbbackupmgr -node-uuid=85ce9cbd1ede710f468d8ad026c12e62 -public-address=127.0.0.1 -admin-port=9000 -log-file=none -log-level=debug -integrated-mode -integrated-mode-host=http://127.0.0.1:9000 -secure-integrated-mode-host=https://127.0.0.1:19000 -integrated-mode-user=@backup -tmp-dir=/home/couchbase/Projects/couchbase-build/ns_server/tmp -cbauth-host=127.0.0.1:9000

[error_logger:error,2021-11-23T18:53:17.790Z,n_0@127.0.0.1:service_rebalancer-backup<0.5126.0>:ale_error_logger_handler:do_log:101]

=========================CRASH REPORT=========================

  crasher:

    initial call: misc:'-spawn_monitor/1-fun-0-'/0

    pid: <0.5126.0>

    registered_name: 'service_rebalancer-backup'

    exception exit: {agent_died,<0.5049.0>,

                        {linked_process_died,<0.5050.0>,

                            {'n_0@127.0.0.1',

                                {no_connection,"backup-service_api"}}}}

      in function  service_rebalancer:run_rebalance/1 (src/service_rebalancer.erl, line 73)

    ancestors: [cleanup_process,ns_janitor_server,ns_orchestrator_child_sup,

                  ns_orchestrator_sup,mb_master_sup,mb_master,

                  leader_registry_sup,leader_services_sup,<0.678.0>,

                  ns_server_sup,ns_server_nodes_sup,<0.273.0>,

                  ns_server_cluster_sup,root_sup,<0.146.0>]

    message_queue_len: 0

    messages: []

    links: []

    dictionary: []

    trap_exit: false

    status: running

    heap_size: 2586

    stack_size: 29

    reductions: 7423

  neighbours:

[ns_server:error,2021-11-23T18:53:17.791Z,n_0@127.0.0.1:cleanup_process<0.5125.0>:service_janitor:init_topology_aware_service:91]Initial rebalance for `backup` failed: {error,

                                        {initial_rebalance_failed,backup,

                                         {agent_died,<0.5049.0>,

                                          {linked_process_died,<0.5050.0>,

                                           {'n_0@127.0.0.1',

                                            {no_connection,

                                             "backup-service_api"}}}}}}

2021-11-23T18:51:17.784Z INFO (Rebalance) Cancelling rebalance

2021-11-23T18:51:17.784Z ERROR (Rebalance) Couldn't confirm node was added {"nodeID": "85ce9cbd1ede710f468d8ad026c12e62", "err": "could not add self: retries aborted after 1 attempts: context canceled"}