OpenQA.Selenium.WebDriverException: 'Cannot start the driver service on http://localhost:64225/'

I want to change my ip address and visit a site using proxy ip, but in the code block

IWebDriver driver = new FirefoxDriver(firefoxDriverService, firefoxOptions);

It gives an error when it comes to the line. I would greatly appreciate your help. Thank you in advance.

My code block :

    FirefoxDriverService firefoxDriverService = FirefoxDriverService.CreateDefaultService();
                firefoxDriverService.HideCommandPromptWindow = true;
                FirefoxOptions firefoxOptions = new FirefoxOptions();
    
                string proxyIp = "xxx.xxx.xxx.xxx";
                string proxyUsername = "my_user_name";
                string proxyPassword = "my_password";
                string proxyPort = "xxxx";
    
                var proxy = new
                {
                    Ip = proxyIp,
                    Username = proxyUsername,
                    Password = proxyPassword,
                    Port = proxyPort
                };
    
                string PROXY = proxy.Ip + ":" + proxy.Port;
                Proxy pro = new Proxy();
                pro.Kind = ProxyKind.Manual;
                pro.IsAutoDetect = false;
                pro.HttpProxy = PROXY;
                pro.FtpProxy = PROXY;
                pro.SslProxy = PROXY;
                firefoxOptions.Proxy = pro;
                firefoxOptions.AddArgument("ignore-certificate-errors");
    
               IWebDriver driver = new FirefoxDriver(firefoxDriverService, firefoxOptions);
    
                var wait = new WebDriverWait(driver, new TimeSpan(0, 0, 60)); //Bekleme süresi
                driver.Navigate().GoToUrl("https://www.busra.com/");
                driver.Manage().Window.Maximize(); //sayfayı büyüt
    
    
                //AutoIt kütüphanesi kullanarak username ve password bilgilerinin girilmesi
                AutoItX.AutoItSetOption("WinTitleMatchMode", 2);
    
                AutoItX.WinWaitActive("- Firefox", "", 10);
                AutoItX.WinActivate("- Firefox");
    
                AutoItX.Send(proxyUsername);
                AutoItX.Send("{TAB}");
                AutoItX.Send(proxyPassword);
                AutoItX.Send("{ENTER}");
    
                AutoItX.WinWaitActive("Save password for ", "", 10);
                AutoItX.WinActivate("Save password for ");
    
                AutoItX.Send("{TAB}");
                AutoItX.Send("{SPACE}");
    
                var element = wait.Until(SeleniumExtras.WaitHelpers.ExpectedConditions.ElementToBeClickable(By.Id("search_button")));
                //Search butonuna tıkla
                element.Click();