Also, saw the following error in Kibana log file.
got an error [403] Forbidden { Error: Insufficient user permissions for monitoring data
at handleError (D:/Apps/Program Files/kibana-5.5.1-windows-x86/plugins/x-pack/plugins/monitoring/server/lib/handle_error.js:22:17)
at D:/Apps/Program Files/kibana-5.5.1-windows-x86/plugins/x-pack/plugins/monitoring/server/routes/api/v1/cluster/clusters.js:34:22
at throw (native)
at step (D:\Apps\Program Files\kibana-5.5.1-windows-x86\plugins\x-pack\plugins\monitoring\server\routes\api\v1\cluster\clusters.js:20:191)
at D:\Apps\Program Files\kibana-5.5.1-windows-x86\plugins\x-pack\plugins\monitoring\server\routes\api\v1\cluster\clusters.js:20:402
data: null,
isBoom: true,
isServer: false,
output:
{ statusCode: 403,
payload:
{ statusCode: 403,
error: 'Forbidden',
message: 'Insufficient user permissions for monitoring data' },
headers: { 'kbn-name': 'kibana', 'kbn-version': '5.5.1' } },
reformat: [Function] }