Hi All,
I've gone through many posts regarding this and still couldn't manage to fix the issue.
Below are the details of the environment and the index details:
A Clean Installation of ELK followed steps mentioned on:
The only thing changed is instead of Nginx I'm using apache.
Operating System: CentOS 7
ELK Versions:
Elasticsearch 6.5.2,
Kibana 6.6.2,
Logstash 6.5.2, and
Filebeat 6.5.2
Current Disk Usage

The Issue:
Getting the error while trying to Create an Index pattern from the index filebeat-*
this filebeat is reading syslog on the server.
Request URL: https://MyHostName/kibana/api/saved_objects/index-pattern/015d2500-45a6-11e9-98dd-49be5a77d05f
Request method:PUT
Response: 403 Forbidden
Error on the Kibana Page While trying to Create the index pattern based on filebeat-* :
Error: Forbidden
KFetchError@https://MyHostName/kibana/bundles/commons.bundle.js:3:1049083
kfetch/</</promise</</</<@https://MyHostName/kibana/bundles/commons.bundle.js:3:504592
step@https://MyHostName/kibana/dlls/vendors.bundle.dll.js:524:4010
verb/<@https://MyHostName/kibana/dlls/vendors.bundle.dll.js:524:3275
fulfilled@https://MyHostName/kibana/dlls/vendors.bundle.dll.js:524:2659
run@https://MyHostName/kibana/dlls/vendors.bundle.dll.js:212:1730377
notify/<@https://MyHostName/kibana/dlls/vendors.bundle.dll.js:212:1730664
flush@https://MyHostName/kibana/dlls/vendors.bundle.dll.js:212:1737402
Result of
GET _cat/indices
green open filebeat-6.6.2-2019.02.14 pUpM-pXlQ2ixX_9vZgpBoA 3 0  6614 0  1.5mb  1.5mb
green open filebeat-6.6.2-2019.03.13 gO2BFT98QdWzp2pn856V0Q 3 0 50654 0 14.1mb 14.1mb
green open filebeat-6.6.2-2019.03.04 8hloDqutSaq139iH6XiX9w 3 0 12295 0  3.8mb  3.8mb
green open filebeat-6.6.2-2019.02.19 nydUtpbJQsGaeRjvTGb-JA 3 0  6876 0  1.5mb  1.5mb
green open filebeat-6.6.2-2019.02.11 ne0d4v0wSvu13MGK83pJcg 3 0  6107 0  1.7mb  1.7mb
green open filebeat-6.6.2-2019.03.12 uh6kt0-BQkOoJIkreRVc3A 3 0 44722 0  9.3mb  9.3mb
green open filebeat-6.6.2-2019.02.20 GfbEXMb8SiS6KjyMu7rOGg 3 0 36500 0  7.3mb  7.3mb
green open kibana_sample_data_logs   G0NfXAzATEifUTyKA7p91A 1 0 14005 0 11.3mb 11.3mb
green open filebeat-6.6.2-2019.02.26 _onWs8UCT1GzEWLoQej3jw 3 0  8244 0  1.9mb  1.9mb
green open filebeat-6.6.2-2019.03.01 a6RpEeiwRyGhy0nTRgLnAg 3 0 10855 0  2.8mb  2.8mb
green open .kibana_1                 sFxKdpFtT9CSnHUumOaCsw 1 0     4 0 17.7kb 17.7kb
green open filebeat-6.6.2-2019.03.06 -AbS-8NaQim4YzDdATLAMg 3 0  8234 0  2.5mb  2.5mb
green open filebeat-6.6.2-2019.02.18 cOXjWDB5Sx-Lt9TtW26OZA 3 0  8428 0  1.9mb  1.9mb
green open filebeat-6.6.2-2019.02.12 aSLfIaezQTadVEEQmDp98w 3 0  6109 0  1.3mb  1.3mb
green open filebeat-6.6.2-2019.02.21 6A-dGRpSThWhk5RyhM4EqA 3 0 18085 0  3.5mb  3.5mb
green open filebeat-6.6.2-2019.02.28 sZ0hcMkJQhGFfLDo4zuylQ 3 0  9302 0  2.6mb  2.6mb
green open filebeat-6.6.2-2019.02.13 _mvPMqyGTdy-GYxhtZk_fQ 3 0  7858 0  1.8mb  1.8mb
green open filebeat-6.6.2-2019.02.15 b3_jSYs6RY6vUAtSJY_0YQ 3 0  6514 0  1.4mb  1.4mb
green open filebeat-6.6.2-2019.03.08 kBs7XMQlTYam2FtxCXuOLw 3 0  7839 0  1.6mb  1.6mb
green open filebeat-6.6.2-2019.03.07 CUNEyP1eQt2Nqjnhb0AdYQ 3 0  9140 0  2.7mb  2.7mb
green open filebeat-6.6.2-2019.02.22 5ZdEOL6UTDebLhG5PnICCw 3 0  7201 0  1.4mb  1.4mb
green open filebeat-6.6.2-2019.03.11 EeUP-GP1TPiXIG39ONKp-w 3 0  7274 0  1.6mb  1.6mb
green open filebeat-6.6.2-2019.02.27 hANjUnRURsCB5hrdamfpTg 3 0  5901 0  1.2mb  1.2mb
green open filebeat-6.6.2-2019.02.25 1OC7RGozQsGYVRY4Fg2CuA 3 0  5636 0  1.6mb  1.6mb
green open filebeat-6.6.2-2019.03.05 ana6-PKJSRS5Egak7yEMmQ 3 0 17687 0  7.1mb  7.1mb
`--------------------------------------------------------------------------------------
Result of : 
POST .kibana/_search
{
  "size": 10000,
  "from": 0,
  "_source": ["index-pattern.title", "type", "title"],
  "version": true,
  "query": {
    "bool": {
      "filter": [{
        "term": {
          "type": "index-pattern"
        }
      }]
    }
  }
} 
Result:
    {
      "took" : 0,
      "timed_out" : false,
      "_shards" : {
        "total" : 1,
        "successful" : 1,
        "skipped" : 0,
        "failed" : 0
      },
      "hits" : {
        "total" : 1,
        "max_score" : 0.0,
        "hits" : [
          {
            "_index" : ".kibana_1",
            "_type" : "doc",
            "_id" : "index-pattern:015d2500-45a6-11e9-98dd-49be5a77d05f",
            "_version" : 1,
            "_score" : 0.0,
            "_source" : {
              "index-pattern" : {
                "title" : "filebeat-*"
              },
              "type" : "index-pattern"
            }
          }
        ]
      }
    }
    ------------------------------------------------------------------------------------------------------
    Tried Already: 
     PUT _settings
        {
        "index": {
        "blocks": {
        "read_only_allow_delete": "false"
        }
        }
        }
AND 
 PUT filebeat-*
    {
    "index": {
    "blocks": {
    "read_only_allow_delete": "false"
    }
    }
    }
AND 
DELETE kibana*
AND 
curl -XPUT -H "Content-Type: application/json" https://[YOUR_ELASTICSEARCH_ENDPOINT]:9200/_all/_settings -d '{"index.blocks.read_only_allow_delete": null}' 
AND 
sudo filebeat setup --dashboards
Still same issue.
Something that might be little different (follwed the commands on the ref. installation Page mentioned above)  :
sudo filebeat setup --template -E output.logstash.enabled=false -E 'output.elasticsearch.hosts=["localhost:9200"]'
    sudo filebeat setup -e -E output.logstash.enabled=false -E output.elasticsearch.hosts=['localhost:9200'] -E setup.kibana.host=localhost:5601 
Please any help is most welcome.