"Invalid UTF-8 middle byte 0x22

Elastic Stack Elasticsearch
1

Good morning when I make this request:

{
"query": {
"bool": {
"must":
{
"match": {
"titolo": "'.$titolo_check.'"
}
},

  "filter": [
    {
      "term": {
        "superficie": "'.$superficie.'"
      }
    },
    {
      "term": {
        "prezzo": "'.$prezzo.'"
      }
    },
    {
      "term": {
        "comune": "'.$comune_s.'"
      }
    }
  ]
}

}
}

I receive this error:
Fatal error : Uncaught exception 'Elasticsearch\Common\Exceptions\ServerErrorResponseException' with message '{"error":{"root_cause":[{"type":"json_parse_exception","reason":"Invalid UTF-8 middle byte 0x22\n at [Source: org.elasticsearch.transport.netty4.ByteBufStreamInput@f9a751; line: 25, column: 30]"}],"type":"json_parse_exception","reason":"Invalid UTF-8 middle byte 0x22\n at

The problem occurs when the variable $comune_s has accents. How could I solve?

2

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