Ionic 4 Angular http get in iOS for wordpress

问题

Basically I'm using this tutorial: https://devdactic.com/ionic-4-wordpress-client/

Everything works perfect in Android as well in release APP and in iOS as long as I use in iOS life reload. As soon as I run it in xcode I'm getting error message by get https.

Any idea? I tried searching on Google, but found nothing of use. Thanks!

[error] - ERROR 
{ 
   "headers":{ 
      "normalizedNames":{ 

      },
      "lazyUpdate":null,
      "headers":{ 

      }
   },
   "status":0,
   "statusText":"Unknown Error",
   "url":"https://rhein-neckar-skater.de/wp-json/wp/v2/pages/18?_embed",
   "ok":false,
   "name":"HttpErrorResponse",
   "message":"Http failure response for https://rhein-neckar-skater.de/wp-json/wp/v2/pages/18?_embed: 0 Unknown Error",
   "error":{ 
      "isTrusted":true
   }
}

来源：https://stackoverflow.com/questions/59829097/ionic-4-angular-http-get-in-ios-for-wordpress