Cowboy error

Cowboy.erl

Ranch listener AppWeb.Endpoint.HTTP had connection process started with :cowboy_clear:start_link/4 at #PID<0.31303.0> exit with reason: 
{
  :function_clause, 
  [
    {
      :cowboy_http, 
      :commands, 
      [
        {
          :state, 
          #PID<0.3014.0>, 
          AppWeb.Endpoint.HTTP, #Port<0.16609>, 
          :ranch_tcp, 
          :undefined, 
          %{
            compress: true, 
            env: %{
              dispatch: [
                {:_, [], [
                {:_, [], Phoenix.Endpoint.Cowboy2Handler, {AppWeb.Endpoint, []}}]}
              ]
            }, 
            idle_timeout: 300000, 
            max_header_value_length: 8096, 
            stream_handlers: [:cowboy_compress_h, :cowboy_telemetry_h, :cowboy_stream_h]
          }, 
          "", 
          %{}, 
          { {182, 19, 0, 4}, 36160 }, 
          { {182, 19, 0, 3}, 5050 }, 
          :undefined, 
          #Reference<0.113077775.3470000130.122366>, 
          true, 
          2, 
          { :ps_request_line, 0 }, 
          :infinity, 
          1, 
          :done, 
          1000, 
          [
            {
              :stream, 
              1, 
              {
                :cowboy_compress_h, 
                {
                  :state, 
                  {
                    :cowboy_telemetry_h, 
                    {
                      :state, 
                      {
                        :cowboy_stream_h, 
                        {
                          :state, 
                          :undefined, 
                          AppWeb.Endpoint.HTTP, 
                          #PID<0.31304.0>, 
                          :undefined, 
                          #PID<0.31304.0>, 
                          :undefined, 
                          :undefined, 
                          ...
                        }
                      }, 
                      #Function<0.92072130/1 in :cowboy_telemetry_h.add_metrics_callback/1>, 
                      :undefined, 
                      %{
                        body_length: 426168, 
                        cert: :undefined, 
                        has_body: true, 
                        headers: %{
                          "accept" => "application/json", 
                          "accept-encoding" => "gzip", 
                          "accept-language" => 
                          "nl-be", 
                          ...
                        }, 
                        host: "app.com", 
                        method: "PUT", 
                        path: "/api/files", 
                        ...
                      }, 
                      "200 OK", 
                      %{
                        "access-control-allow-credentials" => "true", 
                        "access-control-allow-origin" => "https://app.com", 
                        "access-control-expose-headers" => "", 
                        "cache-control" => "max-age=0, private, must-revalidate", 
                        "content-length" => "675", 
                        ...
                      }, 
                      AppWeb.Endpoint.HTTP, 
                      -576444645116602572, 
                      :undefined, 
                      -576444645116558857, 
                      -576444645106074131, 
                      ...
                    }
                  }, 
                  300, 
                  :gzip, 
                  :undefined, 
                  :sync
                }
              }, 
              "PUT", 
              :"HTTP/1.1", 
              :undefined, 
              :undefined, 
              0, 
              []
            }
          ], 
          [
            {:child, #PID<0.31304.0>, 1, 5000, :undefined}
          ]
        }, 
        1, 
        [
          {
            :response, 
            "200 OK", 
            %{
              "access-control-allow-credentials" => "true", 
              "access-control-allow-origin" => "https://app.com", 
              "access-control-expose-headers" => "", 
              "cache-control" => "max-age=0, private, must-revalidate", 
              "content-encoding" => "gzip", 
              "content-length" => "424", 
              "content-type" => "application/json; charset=utf-8", 
              "date" => "Mon, 19 Oct 2020 20:16:21 GMT", 
              "server" => "Cowboy", 
              "vary" => ["Origin", ", accept-encoding"], 
              "x-request-id" => "Fj9-C-lk3rIUDZ0AAV3y"
            }, 
            [<<31, 139, 8, 0, 0, 0, 0, 0, 0, 3, 173, 81, 219, 110, 219, 48, 12, 253, 149, 192, 64, 247, 84, 201, 186, 88, 137, 29, 192, 24, 140, 118, 107, 186, 97, ...>>]
          }
        ]
      ], 
      [ file: '/builds/company/app/app/deps/cowboy/src/cowboy_http.erl', line: 954 ]
    }, 
    {
      :cowboy_http, 
      :loop, 
      1, 
      [ file: '/builds/company/app/app/deps/cowboy/src/cowboy_http.erl', line: 254 ]
    }, 
    {
      :proc_lib, 
      :init_p_do_apply, 
      3, 
      [ file: 'proc_lib.erl', line: 226 ]
    }
  ]
}