I upgraded kibana from 6.6.1 to 6.7 on Linux. I am seeing this error.
I installed using tar package. My elastic search version is 6.6.1.
{"type":"log","@timestamp":"2019-04-01T23:03:26Z","tags":["warning","task_manager"],"pid":14074,"message":"PollError [illegal_argument_exception] request [/_template/.kibana_task_manager] contains unrecognized parameter: [include_type_name]"}
{"type":"log","@timestamp":"2019-04-01T23:03:29Z","tags":["warning","task_manager"],"pid":14074,"message":"PollError [illegal_argument_exception] request [/_template/.kibana_task_manager] contains unrecognized parameter: [include_type_name]"}
{"type":"log","@timestamp":"2019-04-01T23:03:32Z","tags":["warning","task_manager"],"pid":14074,"message":"PollError [illegal_argument_exception] request [/_template/.kibana_task_manager] contains unrecognized parameter: [include_type_name]"}
{"type":"log","@timestamp":"2019-04-01T23:03:35Z","tags":["warning","task_manager"],"pid":14074,"message":"PollError [illegal_argument_exception] request [/_template/.kibana_task_manager] contains unrecognized parameter: [include_type_name]"}
^C