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elasticsearch No converter found capable of converting from type [java.lang.Long] to type [java.time.LocalDateTime]

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import org.springframework.core.convert.converter.Converter;
import org.springframework.data.convert.ReadingConverter;

import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;

@ReadingConverter

public class LongToLocalTimeReadingConverter implements Converter<Long, LocalDateTime> {
    @Override
    public LocalDateTime convert(Long source) {
        if (source != null) {
            return Instant.ofEpochMilli(source).atZone(ZoneId.systemDefault()).toLocalDateTime();
        }
        return null;
    }
}

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    @Bean
    @Override
    public ElasticsearchCustomConversions elasticsearchCustomConversions() {
        return new ElasticsearchCustomConversions(List.of(new LongToLocalTimeReadingConverter()));
    }