Hi @byseop,

The reason is your trailing slash. Compare the following URLs:

https://api.themoviedb.org/3/search/movie/?query=조커&api_key=###&language=ko-KR&page=1
https://api.themoviedb.org/3/search/movie?query=조커&api_key=###&language=ko-KR&page=1

Here's the 2 requests side by side:

$ curl -v "https://api.themoviedb.org/3/search/movie/?query=조커&api_key=###&language=ko-KR&page=1"
*   Trying 54.87.66.88...
* TCP_NODELAY set
* Connected to api.themoviedb.org (54.87.66.88) port 443 (#0)
* ALPN, offering h2
* ALPN, offering http/1.1
* successfully set certificate verify locations:
*   CAfile: /etc/ssl/cert.pem
  CApath: none
* TLSv1.2 (OUT), TLS handshake, Client hello (1):
* TLSv1.2 (IN), TLS handshake, Server hello (2):
* TLSv1.2 (IN), TLS handshake, Certificate (11):
* TLSv1.2 (IN), TLS handshake, Server key exchange (12):
* TLSv1.2 (IN), TLS handshake, Server finished (14):
* TLSv1.2 (OUT), TLS handshake, Client key exchange (16):
* TLSv1.2 (OUT), TLS change cipher, Change cipher spec (1):
* TLSv1.2 (OUT), TLS handshake, Finished (20):
* TLSv1.2 (IN), TLS change cipher, Change cipher spec (1):
* TLSv1.2 (IN), TLS handshake, Finished (20):
* SSL connection using TLSv1.2 / ECDHE-RSA-AES128-GCM-SHA256
* ALPN, server accepted to use h2
* Server certificate:
*  subject: CN=*.themoviedb.org
*  start date: Dec  3 00:00:00 2018 GMT
*  expire date: Dec  2 12:00:00 2020 GMT
*  subjectAltName: host "api.themoviedb.org" matched cert's "*.themoviedb.org"
*  issuer: C=US; O=DigiCert Inc; OU=www.digicert.com; CN=RapidSSL RSA CA 2018
*  SSL certificate verify ok.
* Using HTTP2, server supports multi-use
* Connection state changed (HTTP/2 confirmed)
* Copying HTTP/2 data in stream buffer to connection buffer after upgrade: len=0
* Using Stream ID: 1 (easy handle 0x7feec8004600)
> GET /3/search/movie/?query=조커&api_key=###&language=ko-KR&page=1 HTTP/2
> Host: api.themoviedb.org
> User-Agent: curl/7.64.1
> Accept: */*
> 
* Connection state changed (MAX_CONCURRENT_STREAMS == 128)!
< HTTP/2 301 
< date: Tue, 19 Nov 2019 03:41:08 GMT
< content-type: text/plain
< location: http://api.themoviedb.org/3/search/movie?query=조커&api_key=###&language=ko-KR&page=1
< server: openresty
< access-control-allow-origin: *
< access-control-allow-methods: GET, HEAD, POST, PUT, DELETE, OPTIONS
< access-control-expose-headers: ETag, X-RateLimit-Limit, X-RateLimit-Remaining, X-RateLimit-Reset, Retry-After, Content-Length, Content-Range
< 
* Connection #0 to host api.themoviedb.org left intact
* Closing connection 0

Vs. the second one, with no trailing slash:

$ curl -v "https://api.themoviedb.org/3/search/movie?query=조커&api_key=###&language=ko-KR&page=1"
*   Trying 3.222.214.45...
* TCP_NODELAY set
* Connected to api.themoviedb.org (3.222.214.45) port 443 (#0)
* ALPN, offering h2
* ALPN, offering http/1.1
* successfully set certificate verify locations:
*   CAfile: /etc/ssl/cert.pem
  CApath: none
* TLSv1.2 (OUT), TLS handshake, Client hello (1):
* TLSv1.2 (IN), TLS handshake, Server hello (2):
* TLSv1.2 (IN), TLS handshake, Certificate (11):
* TLSv1.2 (IN), TLS handshake, Server key exchange (12):
* TLSv1.2 (IN), TLS handshake, Server finished (14):
* TLSv1.2 (OUT), TLS handshake, Client key exchange (16):
* TLSv1.2 (OUT), TLS change cipher, Change cipher spec (1):
* TLSv1.2 (OUT), TLS handshake, Finished (20):
* TLSv1.2 (IN), TLS change cipher, Change cipher spec (1):
* TLSv1.2 (IN), TLS handshake, Finished (20):
* SSL connection using TLSv1.2 / ECDHE-RSA-AES128-GCM-SHA256
* ALPN, server accepted to use h2
* Server certificate:
*  subject: CN=*.themoviedb.org
*  start date: Dec  3 00:00:00 2018 GMT
*  expire date: Dec  2 12:00:00 2020 GMT
*  subjectAltName: host "api.themoviedb.org" matched cert's "*.themoviedb.org"
*  issuer: C=US; O=DigiCert Inc; OU=www.digicert.com; CN=RapidSSL RSA CA 2018
*  SSL certificate verify ok.
* Using HTTP2, server supports multi-use
* Connection state changed (HTTP/2 confirmed)
* Copying HTTP/2 data in stream buffer to connection buffer after upgrade: len=0
* Using Stream ID: 1 (easy handle 0x7f98f1805400)
> GET /3/search/movie?query=조커&api_key=###&language=ko-KR&page=1 HTTP/2
> Host: api.themoviedb.org
> User-Agent: curl/7.64.1
> Accept: */*
> 
* Connection state changed (MAX_CONCURRENT_STREAMS == 128)!
< HTTP/2 200 
< date: Tue, 19 Nov 2019 03:41:18 GMT
< content-type: application/json;charset=utf-8
< content-length: 1925
< server: openresty
< vary: Accept-Encoding
< access-control-allow-origin: *
< access-control-allow-methods: GET, HEAD, POST, PUT, DELETE, OPTIONS
< access-control-expose-headers: ETag, X-RateLimit-Limit, X-RateLimit-Remaining, X-RateLimit-Reset, Retry-After, Content-Length, Content-Range
< vary: Accept-Encoding
< etag: 0950ca92a4dcf426067cfd2246bb5ff3
< cache-control: public, max-age=21600
< 
* Connection #0 to host api.themoviedb.org left intact
* Closing connection 0

{
  "page": 1,
  "total_results": 3,
  "total_pages": 1,
  "results": [
    {
      "popularity": 384.312,
      "vote_count": 5638,
      "video": false,
      "poster_path": "/wrCwH6WOvXQvVuqcKNUrLDCDxdw.jpg",
      "id": 475557,
      "adult": false,
      "backdrop_path": "/n6bUvigpRFqSwmPp1m2YADdbRBc.jpg",
      "original_language": "en",
      "original_title": "Joker",
      "genre_ids": [
        80,
        18,
        53
      ],
      "title": "조커",
      "vote_average": 8.4,
      "overview": "홀어머니와 사는 아서 플렉(호아킨 피닉스)은 코미디언을 꿈꾸지만 그의 삶은 좌절과 절망으로 가득 차 있다. 광대 아르바이트는 그에게 모욕을 가져다주기 일쑤고, 긴장하면 웃음을 통제할 수 없는 신경병 증세는 그를 더욱 고립시킨다. 정부 예산 긴축으로 인해 정신과 약물을 지원하던 공공의료 서비스마저 없어져 버린 어느 날, 아서는 지하철에서 시비를 걸어온 증권사 직원들에게 얻어맞던 와중에 동료가 건네준 권총으로 그들을 쏴 버리고 만다. 군중들은 지배계급에 대한 저항의 아이콘이 된 그를 추종하기 시작하며 광대 마스크로 얼굴을 가리고 거리로 쏟아져 나오기 시작하는데...",
      "release_date": "2019-10-02"
    },
    {
      "popularity": 1.218,
      "vote_count": 9,
      "video": false,
      "poster_path": "/ymt8DjBSnXScGvAhOhSpe0DXhzu.jpg",
      "id": 319669,
      "adult": false,
      "backdrop_path": "/f3vYwm8TZZAq8lfM1OiwmfN6xtv.jpg",
      "original_language": "ja",
      "original_title": "ジョーカー・ゲーム",
      "genre_ids": [
        28,
        53
      ],
      "title": "조커 게임",
      "vote_average": 5.9,
      "overview": "",
      "release_date": "2015-01-31"
    },
    {
      "popularity": 9.932,
      "vote_count": 327,
      "video": false,
      "poster_path": "/vIRHN4AXaQM6mMVj8CozhtelYmF.jpg",
      "id": 16234,
      "adult": false,
      "backdrop_path": "/pZCuxgUsDICPDKIFH8s5nQGeL4r.jpg",
      "original_language": "en",
      "original_title": "Batman Beyond: Return of the Joker",
      "genre_ids": [
        28,
        16,
        878,
        10751
      ],
      "title": "배트맨 비욘드: 돌아온 조커",
      "vote_average": 7.6,
      "overview": "",
      "release_date": "2000-12-12"
    }
  ]
}

Thanks. Really helpful. Everything has been completely modified.