Stream was reset: HTTP_1_1_REQUIRED with cert mode = 'no check'

I’m using Ionic v3, cordova-plugin-advanced-http to download files from a ASP.NET WebAPI server through https in Android.

I use setSSLCertMode(‘no check’), however I’m getting error stream was reset: HTTP_1_1_REQUIRED

The strange thing is, it was working yesterday and I still have a working Android APK build, but now I cannot get it to work.

What could be the issue?