What am I doing wrong in this Elastic bulk load command? I can't figure it out!

bulk_load_elastic.sh

while IFS= read -r "path" < "${DOC_LIST_PATH}"
do
    echo "Submitting Elastic formatted docs at ${path} to Elastic index 'docs' ..."
    
    curl \
    -X POST \
    -H "Content-Type: application/x-ndjson" \
    "https://${ES_USER}:${ES_PASSWD}@${ES_HOSTNAME}:${ES_PORT}/docs/_bulk" \
    --data-binary "@${path}" 
done

error.txt

Submitting Elastic formatted docs at data/docs_elastic.json/part-00000.json to Elastic index 'docs' ...
Warning: Couldn't read data from file
Warning: "data/docs_elastic.json/part-00000.json",
Warning: this makes an empty POST.
{"error":{"root_cause":[{"type":"parse_exception","reason":"request body is required"}],"type":"parse_exception","reason":"request body is required"},"status":400}

... repeats for all files

part-00000.json

{"create": {"_id": "ef68e997-c616-4b0b-b08e-dfc09f8cb08f"}}
{"id": "ef68e997-c616-4b0b-b08e-dfc09f8cb08f", "title": "@Lastmohican - Lastmohican - Yep", "description": "Yep", "thread": [{"username": "@Lastmohican", "name": "Devon Kinsey", "timestamp": "2021-01-03T00:00:00+00:00", "body": "Yep"}]}

... repeats for all records