Ionic 3 + Android 9 + http calls failing

We are using angular/http for API calls in our apps. All the apps deployed till now are working fine. But in our recent app, we are facing issue on android devices with version 9.0 and in other versions it is working fine. Our previous apps are working fine in android 9.0. we have same source code for these apps. The error we are getting is “Response with status : 0 for URL :null”. We have enabled CORS on our server. Please help me to resolve this issue.Thanks in advance.

changing the API url to https looks like the only working solution.

If you are not having SSL url, you can use
to resolve the issue.