Https calls are failing from Unity SDK on iOS

Hey guys. Hope you are doing well. 

I've just implemented Zendesk Unity SDK , everything is fine on Android and Editor, but on iOS it fails to get articles when I'm trying to open the help center. I've checked also the network calls, and nothing is being sent, so I assume the issue is related to iOS security staff , maybe. 

Here is my client code:

```
await ZendeskSdk.Instance.Home.ShowHomeAsync();
```

And some interesting logs related to this. 

```
Request to https://bebopbeehelp.zendesk.com/api/v2/help_center/en-us/categories.json?page[size]=100 failed with status code 0

Failed to retrieve Guide categories. Status code: 500
```