Ionic 3 app stopped making network request

I don’t know why there is not possibility to make ajax call I have removed node_modules then made : npm i then I have deleted platforms/android

and made : ionic cordova run android the network is still not working (on device or simulator)

I have switched to the master branch which was untouched but still face the same problem

But it works fine on IOS and web. Thank you for your help

I solved the issue related to sdk 28, by adding an attribute in AndroidManifest.xml Application. the attribute :
cleartextTrafficPermitted=“true”. since I was requesting a http (not https) url.