error when trying to update the settings

Hi i am using setting like this way may be it help you:

Close the index

curl -XPOST 'localhost:9200/lookupindex/_close'

Update the settings

curl -XPUT 'localhost:9200/lookupindex/_settings' -d '{
    "index": {
        "analysis": {
            "analyzer": {
                "custom_standard_analyzer": {
                    "type": "custom",
                    "tokenizer": "whitespace",
                    "filter": [
                        "lowercase",
                        "asciifolding",
                        "customstopwords"
                    ]
                },
                "phonetic_analyzer": {
                    "type": "custom",
                    "tokenizer": "standard",
                    "filter": [
                        "lowercase",
                        "asciifolding",
                        "phoneticstopwords"
                    ]
                }
            },
            "filter": {
                "customstopwords": {
                    "type": "stop",
                    "stopwords": [
                        "+",
                        ".",
                        " ",
                        "ca",
                        "fl",
                        "bc",
                        "b.c",
                        "b.c.e",
                        "bce",
                        "act.c.",
                        "act",
                        "style",
                        "style of",
                        "attr.",
                        "attr",
                        "manner of",
                        "manner",
                        "circle of",
                        "circle",
                        "after",
                        "near",
                        "copy",
                        "copy after",
                        "imitator",
                        "school, copy",
                        "studio",
                        "studio of",
                        "Italian school",
                        "workshop of",
                        "workshop",
                        "16th",
                        "or",
                        "17th c.",
                        "late follower",
                        "follower of",
                        "follower",
                        "attributed",
                        "near",
                        "copy after painting",
                        "by or after",
                        "fake",
                        "and school",
                        "workshop-copy",
                        "counterproof",
                        "copy after drawing",
                        "copy of",
                        "school of",
                        "called",
                        "copy IBS",
                        "German School",
                        "placed with",
                        "attribution"
                    ]
                },
                "phoneticstopwords": {
                    "type": "stop",
                    "stopwords": [
                        "+",
                        ",",
                        "-",
                        ".",
                        "ca",
                        "fl",
                        "bc",
                        "b.c",
                        "b.c.e",
                        "bce",
                        "act.c.",
                        "act",
                        "style",
                        "style of",
                        "attr.",
                        "attr",
                        "manner of",
                        "manner",
                        "circle of",
                        "circle",
                        "after",
                        "near",
                        "copy",
                        "copy after",
                        "imitator",
                        "school, copy",
                        "studio",
                        "studio of",
                        "Italian school",
                        "workshop of",
                        "workshop",
                        "16th",
                        "or",
                        "17th c.",
                        "late follower",
                        "follower of",
                        "follower",
                        "attributed",
                        "near",
                        "copy after painting",
                        "by or after",
                        "fake",
                        "and school",
                        "workshop-copy",
                        "counterproof",
                        "copy after drawing",
                        "copy of",
                        "school of",
                        "called",
                        "copy IBS",
                        "German School",
                        "placed with",
                        "attribution"
                    ]
                }
            }
        }
    }
}
'  

Reopen the index once done

curl -XPOST 'localhost:9200/lookupindex/_open'