iOS 12 Http Failure response for url : 0 unkown error

Ionic Framework ionic-v3
1

Hello All,

I’m facing an issue with my app on iPhone devices using iOS 12.
All http calls return http failure response for (https://url…) : 0 uknown error. As I mentioned before I have this problem only on iOS 12 so the app works fine in Android and iOS 13 devices.

The backend is a Symfony REST API ( CORS enabled ).
For http calls I use Angular HttpClient.

Ionic:

   Ionic CLI                     : 6.6.0 (/usr/local/lib/node_modules/@ionic/cli)
   Ionic Framework               : @ionic/angular 5.0.7
   @angular-devkit/build-angular : 0.803.26
   @angular-devkit/schematics    : 8.3.26
   @angular/cli                  : 8.3.26
   @ionic/angular-toolkit        : 2.2.0

Capacitor:

   Capacitor CLI   : 2.0.1
   @capacitor/core : 2.0.1

Utility:

   cordova-res (update available: 0.15.1) : 0.12.1
   native-run                             : 1.0.0

System:

   NodeJS : v12.16.1 (/usr/local/bin/node)
   npm    : 6.14.4
   OS     : macOS Catalina