FunCaptcha solver doesnt work

[kuvarti]

public async Task SolveCaptcha()
{
	TwoCaptcha.TwoCaptcha solver = new TwoCaptcha.TwoCaptcha("-TOKEN-");
	FunCaptcha captcha = new FunCaptcha();
	captcha.SetSiteKey("DF9C4D87-CB7B-4062-9FEB-BADB6ADA61E6");
	captcha.SetUrl("https://demo.arkoselabs.com/?key=DF9C4D87-CB7B-4062-9FEB-BADB6ADA61E6");
	try
	{
		solver.Solve(captcha);
		await solver.WaitForResult(captcha, new Dictionary<string, int>());
	}
	catch (AggregateException ex)
	{
		await page.EvaluateExpressionAsync<string>($"console.log('{ex.InnerExceptions.First().Message}');");
	}
}

the function WaitForResult never returns. code stuck that line.