scrapy-splash: Proxy connection is being refused

The error below suggest that my proxy connection is being refused. The proxy was tested with curl and it is infact working, it requires no credentials which is why the username and password fields were omitted in set_proxy. What else could be the reason for this connection being refused?

–ERROR RenderErrorInfo(type=‘Network’, code=99, text=‘Proxy connection refused’, “message”: “Lua error: [string "…"]:10: network99”, “type”: “LUA_ERROR”, “error”: “network99”},

–TESTING PROXY curl --proxy 127.0.0.1:24000 "http://lumtest.com/myip.json"

–SPIDER CODE

import scrapy
from scrapy_splash import SplashRequest

script = """
function main(splash)
  splash:on_request(function(request)
    request:set_proxy{
        host = "127.0.0.1",
        port = 24000,
    }
  end)

  assert(splash:go{
    splash.args.url,
    headers=splash.args.headers,
    http_method=splash.args.http_method,
    body=splash.args.body,
    })
  assert(splash:wait(0.5))

  local entries = splash:history()
  local last_response = entries[#entries].response
  return {
    url = splash:url(),
    headers = last_response.headers,
    http_status = last_response.status,
    html = splash:html(),
  }
end
"""
class TestlumSpider(scrapy.Spider):
    name = "testlum"
    allowed_domains = ["amazon.ca"]

    def start_requests(self):
		url = "https://www.amazon.ca/dp/1482703270"
 	        yield SplashRequest(url, self.parse, endpoint='execute',
                            args={'lua_source': script,})

    def parse(self, response):
        pass