ML Throws errors as soon as click on it

Elastic Stack Elasticsearch
3

Hi Steve,

I've performed a rolling upgrade to 5.4 this evening so all nodes have been restarted at 5.4. I haven't changed anything in the elaticsearch.yml. From what I read, all nodes are ML nodes by default, so I shouldn't need to change anything, or am I misunderstanding something here?

{
  "security": {
    "available": true,
    "enabled": true,
    "realms": {
      "file": {
        "available": true,
        "enabled": false
      },
      "ldap": {
        "load_balance_type": [
          "failover"
        ],
        "size": [
          0
        ],
        "name": [
          "ldap1"
        ],
        "available": true,
        "ssl": [
          false
        ],
        "enabled": true,
        "order": [
          1
        ],
        "user_search": [
          true
        ]
      },
      "native": {
        "name": [
          "native1"
        ],
        "available": true,
        "size": [
          0
        ],
        "enabled": true,
        "order": [
          0
        ]
      },
      "active_directory": {
        "available": true,
        "enabled": false
      },
      "pki": {
        "available": true,
        "enabled": false
      }
    },
    "roles": {
      "native": {
        "size": 2,
        "fls": true,
        "dls": false
      },
      "file": {
        "size": 0,
        "fls": false,
        "dls": false
      }
    },
    "ssl": {
      "http": {
        "enabled": false
      },
      "transport": {
        "enabled": false
      }
    },
    "audit": {
      "outputs": [
        "index",
        "logfile"
      ],
      "enabled": true
    },
    "ipfilter": {
      "http": false,
      "transport": false
    },
    "system_key": {
      "enabled": false
    },
    "anonymous": {
      "enabled": false
    }
  },
  "watcher": {
    "available": true,
    "enabled": true,
    "count": {
      "active": 0,
      "total": 0
    },
    "execution": {
      "actions": {
        "_all": {
          "total": 0,
          "total_time_in_ms": 0
        }
      }
    }
  },
  "monitoring": {
    "available": true,
    "enabled": true,
    "enabled_exporters": {
      "http": 1
    }
  },
  "graph": {
    "available": true,
    "enabled": true
  },
  "ml": {
    "available": true,
    "enabled": true,
    "jobs": {},
    "datafeeds": {}
  }
}