Cannot start VM, "a general system error occurred, connection refused"

Hi,
I am using ESXi 6.0.
I am not able to start any VM from vSphere client.
If I connect to specific host, I can start VM without problems.

According to this URL:

https://communities.vmware.com/thread/517731

I tried to check status of every process on my VCSA, I got this:

vcsa:/bin # service-control --status
INFO:root:Service: vmware-rhttpproxy, Action: status
Service: vmware-rhttpproxy, Action: status
2017-11-09T08:42:38.411Z   Running command: ['/sbin/service', u'vmware-rhttpproxy', 'status']
2017-11-09T08:42:38.468Z   Done running command
INFO:root:Service: vmware-cis-license, Action: status
Service: vmware-cis-license, Action: status
2017-11-09T08:42:38.469Z   Running command: ['/sbin/service', u'vmware-cis-license', 'status']
2017-11-09T08:42:38.649Z   Done running command
INFO:root:Service: vmware-psc-client, Action: status
Service: vmware-psc-client, Action: status
2017-11-09T08:42:38.650Z   Running command: ['/sbin/service', u'vmware-psc-client', 'status']
2017-11-09T08:42:38.702Z   Done running command
INFO:root:Service: vmware-sca, Action: status
Service: vmware-sca, Action: status
2017-11-09T08:42:38.702Z   Running command: ['/sbin/service', u'vmware-sca', 'status']
2017-11-09T08:42:38.880Z   Done running command
INFO:root:Service: vmware-netdumper, Action: status
Service: vmware-netdumper, Action: status
2017-11-09T08:42:38.881Z   Running command: ['/sbin/service', u'vmware-netdumper', 'status']
2017-11-09T08:42:38.951Z   Done running command
INFO:root:Service: vmware-syslog, Action: status
Service: vmware-syslog, Action: status
2017-11-09T08:42:38.952Z   Running command: ['/sbin/service', u'vmware-syslog', 'status']
2017-11-09T08:42:39.042Z   Done running command
INFO:root:Service: vmware-syslog-health, Action: status
Service: vmware-syslog-health, Action: status
2017-11-09T08:42:39.042Z   Running command: ['/sbin/service', u'vmware-syslog-health', 'status']
2017-11-09T08:42:39.229Z   Done running command
INFO:root:Service: vmware-vapi-endpoint, Action: status
Service: vmware-vapi-endpoint, Action: status
2017-11-09T08:42:39.230Z   Running command: ['/sbin/service', u'vmware-vapi-endpoint', 'status']
2017-11-09T08:42:39.331Z   Done running command
INFO:root:Service: vmware-vpostgres, Action: status
Service: vmware-vpostgres, Action: status
2017-11-09T08:42:39.331Z   Running command: ['/sbin/service', u'vmware-vpostgres', 'status']
2017-11-09T08:42:39.459Z   Done running command
INFO:root:Service: vmware-invsvc, Action: status
Service: vmware-invsvc, Action: status
2017-11-09T08:42:39.460Z   Running command: ['/sbin/service', u'vmware-invsvc', 'status']
2017-11-09T08:42:39.649Z   Done running command
INFO:root:Service: vmware-mbcs, Action: status
Service: vmware-mbcs, Action: status
2017-11-09T08:42:39.649Z   Running command: ['/sbin/service', u'vmware-mbcs', 'status']
2017-11-09T08:42:39.803Z   Done running command
INFO:root:Service: vmware-vpxd, Action: status
Service: vmware-vpxd, Action: status
2017-11-09T08:42:39.804Z   Running command: ['/sbin/service', u'vmware-vpxd', 'status']
2017-11-09T08:42:40.397Z   Done running command
INFO:root:Service: vmware-eam, Action: status
Service: vmware-eam, Action: status
2017-11-09T08:42:40.398Z   Running command: ['/sbin/service', u'vmware-eam', 'status']
2017-11-09T08:42:40.508Z   Done running command
INFO:root:Service: vmware-rbd-watchdog, Action: status
Service: vmware-rbd-watchdog, Action: status
2017-11-09T08:42:40.509Z   Running command: ['/sbin/service', u'vmware-rbd-watchdog', 'status']
2017-11-09T08:42:40.577Z   Done running command
INFO:root:Service: vmware-sps, Action: status
Service: vmware-sps, Action: status
2017-11-09T08:42:40.578Z   Running command: ['/sbin/service', u'vmware-sps', 'status']
2017-11-09T08:42:40.774Z   Done running command
INFO:root:Service: vmware-vdcs, Action: status
Service: vmware-vdcs, Action: status
2017-11-09T08:42:40.775Z   Running command: ['/sbin/service', u'vmware-vdcs', 'status']
2017-11-09T08:42:40.947Z   Done running command
INFO:root:Service: vmware-vpx-workflow, Action: status
Service: vmware-vpx-workflow, Action: status
2017-11-09T08:42:40.947Z   Running command: ['/sbin/service', u'vmware-vpx-workflow', 'status']
2017-11-09T08:42:41.024Z   Done running command
INFO:root:Service: vmware-vsan-health, Action: status
Service: vmware-vsan-health, Action: status
2017-11-09T08:42:41.024Z   Running command: ['/sbin/service', u'vmware-vsan-health', 'status']
2017-11-09T08:42:41.040Z   Done running command
INFO:root:Service: vmware-vsm, Action: status
Service: vmware-vsm, Action: status
2017-11-09T08:42:41.041Z   Running command: ['/sbin/service', u'vmware-vsm', 'status']
2017-11-09T08:42:41.148Z   Done running command
INFO:root:Service: vsphere-client, Action: status
Service: vsphere-client, Action: status
2017-11-09T08:42:41.149Z   Running command: ['/sbin/service', u'vsphere-client', 'status']
2017-11-09T08:42:41.324Z   Done running command
INFO:root:Service: vmware-perfcharts, Action: status
Service: vmware-perfcharts, Action: status
2017-11-09T08:42:41.325Z   Running command: ['/sbin/service', u'vmware-perfcharts', 'status']
2017-11-09T08:42:41.434Z   Done running command
INFO:root:Service: vmware-vws, Action: status
Service: vmware-vws, Action: status
2017-11-09T08:42:41.435Z   Running command: ['/sbin/service', u'vmware-vws', 'status']
2017-11-09T08:42:41.546Z   Done running command
INFO:root:Running:
 vmware-cis-license (VMware License Service) vmware-eam (VMware ESX Agent Manager) vmware-invsvc (VMware Inventory Service) vmware-perfcharts (VMware Performance Charts) vmware-psc-client (VMware Platform Services Controller Client) vmware-rhttpproxy (VMware HTTP Reverse Proxy) vmware-sca (VMware Service Control Agent) vmware-sps (VMware vSphere Profile-Driven Storage Service) vmware-syslog (VMware Common Logging Service) vmware-syslog-health (VMware Syslog Health Service) vmware-vapi-endpoint (VMware vAPI Endpoint) vmware-vdcs (VMware Content Library Service) vmware-vpostgres (VMware Postgres) vmware-vpxd (VMware vCenter Server) vmware-vsan-health (VMware VSAN Health Service) vmware-vsm (VMware vService Manager) vmware-vws (VMware System and Hardware Health Manager) vsphere-client ()
Running:
 vmware-cis-license (VMware License Service) vmware-eam (VMware ESX Agent Manager) vmware-invsvc (VMware Inventory Service) vmware-perfcharts (VMware Performance Charts) vmware-psc-client (VMware Platform Services Controller Client) vmware-rhttpproxy (VMware HTTP Reverse Proxy) vmware-sca (VMware Service Control Agent) vmware-sps (VMware vSphere Profile-Driven Storage Service) vmware-syslog (VMware Common Logging Service) vmware-syslog-health (VMware Syslog Health Service) vmware-vapi-endpoint (VMware vAPI Endpoint) vmware-vdcs (VMware Content Library Service) vmware-vpostgres (VMware Postgres) vmware-vpxd (VMware vCenter Server) vmware-vsan-health (VMware VSAN Health Service) vmware-vsm (VMware vService Manager) vmware-vws (VMware System and Hardware Health Manager) vsphere-client ()
INFO:root:Stopped:
 vmware-mbcs (VMware Message Bus Configuration Service) vmware-netdumper (VMware vSphere ESXi Dump Collector) vmware-rbd-watchdog (VMware vSphere Auto Deploy Waiter) vmware-vpx-workflow (VMware vCenter Workflow Manager)
Stopped:
 vmware-mbcs (VMware Message Bus Configuration Service) vmware-netdumper (VMware vSphere ESXi Dump Collector) vmware-rbd-watchdog (VMware vSphere Auto Deploy Waiter) vmware-vpx-workflow (VMware vCenter Workflow Manager)

According to this URL:

https://kb.vmware.com/s/article/2109887

I tried to start vmware-mbcs; service started fine, but I have same issue in vSphere client (cannot start any VM).

I tried to stop/start vmware-vpx-workflow, and I got this:

vcsa:/bin # service-control --start vmware-vpx-workflow
INFO:root:Service: vmware-vpx-workflow, Action: start
Service: vmware-vpx-workflow, Action: start
2017-11-09T08:53:48.614Z   Running command: ['/sbin/chkconfig', u'vmware-vpx-workflow']
2017-11-09T08:53:48.696Z   Done running command
2017-11-09T08:53:48.696Z   Running command: ['/sbin/service', u'vmware-vpx-workflow', 'status']
2017-11-09T08:53:48.788Z   Done running command
2017-11-09T08:53:48.788Z   Running command: ['/sbin/chkconfig', '--force', u'vmware-vpx-workflow', 'on']
2017-11-09T08:53:48.841Z   Done running command
2017-11-09T08:53:48.842Z   Running command: ['/sbin/service', u'vmware-vpx-workflow', 'start']
2017-11-09T08:54:05.887Z   Done running command
2017-11-09T08:54:05.887Z   Invoked command: ['/sbin/service', u'vmware-vpx-workflow', 'start']
2017-11-09T08:54:05.887Z   RC = 1
Stdout = VMware vCenter workflow manager is not running.
workflow port = 8088
Waiting for vpxd to initialize
Starting VMware vCenter workflow manager...
wrapper  | An encoding declaration is missing from the top of configuration file, /usr/lib/vmware-vpx/workflow/wrapper/conf/wrapper.conf, trying the system encoding.
wrapper  | An encoding declaration is missing from the top of configuration file, /etc/vmware/wrapper_common.conf, trying the system encoding.
wrapper  | An encoding declaration is missing from the top of configuration file, /etc/vmware/wrapper_linux.conf, trying the system encoding.
wrapper  | An encoding declaration is missing from the top of configuration file, /usr/lib/vmware-vpx/workflow/wrapper/conf/wrapper-classpath.conf, trying the system encoding.
wrapper  | Spawning intermediate process...
Waiting for VMware vCenter workflow manager..................
WARNING: VMware vCenter workflow manager may have failed to start.
Workflow start failed. Error code = 1

Stderr =
2017-11-09T08:54:05.888Z   {
    "resolution": null,
    "detail": [
        {
            "args": [
                "Command: ['/sbin/service', u'vmware-vpx-workflow', 'start']\nStderr: "
            ],
            "id": "install.ciscommon.command.errinvoke",
            "localized": "An error occurred while invoking external command : 'Command: ['/sbin/service', u'vmware-vpx-workflow', 'start']\nStderr: '",
            "translatable": "An error occurred while invoking external command : '%(0)s'"
        }
    ],
    "componentKey": null,
    "problemId": null
}
ERROR:root:Unable to start service vmware-vpx-workflow, Exception: {
    "resolution": null,
    "detail": [
        {
            "args": [
                "vmware-vpx-workflow"
            ],
            "id": "install.ciscommon.service.failstart",
            "localized": "An error occurred while starting service 'vmware-vpx-workflow'",
            "translatable": "An error occurred while starting service '%(0)s'"
        }
    ],
    "componentKey": null,
    "problemId": null
}
Unable to start service vmware-vpx-workflow, Exception: {
    "resolution": null,
    "detail": [
        {
            "args": [
                "vmware-vpx-workflow"
            ],
            "id": "install.ciscommon.service.failstart",
            "localized": "An error occurred while starting service 'vmware-vpx-workflow'",
            "translatable": "An error occurred while starting service '%(0)s'"
        }
    ],
    "componentKey": null,
    "problemId": null
}

Any suggestion?
Thank you!