UnityWebRequest.Get error

Im trying to use this code https://docs.unity3d.com/ScriptReference/Networking.UnityWebRequest.Get.html with this url: www.kinówki.pl (which is valid in browser) and I get error:
www.kinówki.pl: Error: Cannot resolve destination host
I tryed https://www.xn--kinwki-dxa.pl too and get this error:
www.xn--kinwki-dxa.pl: Error: Unknown Error

How do I get such a domain?

 

Code (CSharp):

1. using UnityEngine;
2. using UnityEngine.Networking;
3. using System.Collections;
4.  
5. public class ButtonsHandler : MonoBehaviour
6. {
7.     // Start is called before the first frame update
8.     void Start()
9.     {
10.         StartCoroutine(GetRequest("https://www.kinówki.pl"));
11.         StartCoroutine(GetRequest("https://www.xn--kinwki-dxa.pl"));
12.     }
13.  
14.     // Update is called once per frame
15.     void Update()
16.     {
17.      
18.     }
19.  
20.     IEnumerator GetRequest(string uri)
21.     {
22.         using (UnityWebRequest webRequest = UnityWebRequest.Get(uri))
23.         {
24.             // Request and wait for the desired page.
25.             yield return webRequest.SendWebRequest();
26.  
27.             string[] pages = uri.Split('/');
28.             int page = pages.Length - 1;
29.  
30.             if (webRequest.isNetworkError)
31.             {
32.                 Debug.Log(pages[page] + ": Error: " + webRequest.error);
33.             }
34.             else
35.             {
36.                 Debug.Log(pages[page] + ":\nReceived: " + webRequest.downloadHandler.text);
37.             }
38.         }
39.     }
40. }

 

When I add code like this:

Code (CSharp):

1.             var request = (HttpWebRequest)WebRequest.Create("https://www.xn--kinwki-dxa.pl");
2.             var response = (HttpWebResponse)request.GetResponse();
3.             string responseString;
4.             using (var stream = response.GetResponseStream())
5.             {
6.                 using (var reader = new StreamReader(stream))
7.                 {
8.                     responseString = reader.ReadToEnd();
9.                 }
10.             }

I get more specific error:
TlsException: Handshake failed - error code: UNITYTLS_INTERNAL_ERROR, verify result: UNITYTLS_X509VERIFY_FLAG_NOT_TRUSTED

Is there any way to get around it (Im not owner of the domain)?

 

And I found this:
https://issuetracker.unity3d.com/is...t-http-dot-dll-is-used-for-http-in-the-editor
But I dont get the solution.

 

Is UnityWebRequest be deprecated? Do you have suggestions for alternatives? Or is there a thread of community about alternatives to UnityWebRequest?

 

Oh okay. I saw that UNet will be deprecated. Will it not affect the UnityWebRequest class?

 

I have the same issue with error log UNITYTLS_X509VERIFY_FLAG_NOT_TRUSTED
- Charles does not easily want to track SSL website calls from Unity applications due to a certificate error. This is a very common tool to track server calls (though not sure on SSL sites) so unfortunate, but maybe someone has the solution

Edit, found a helpful Unity article to fix: https://support.unity3d.com/hc/en-us/articles/115002917683-Using-Charles-Proxy-with-Unity