Android Studio doesn't generate signed apk after update to 2.3

Question

I have faced some troubles with uploading release version to fabric(crashlytics) after generating release build in Build->Generate Signed Apk. After moving app-release.apk into Fabric window I see following error: "The provided APK can't be distributed because it is unsigned."

Fabric error

What I'm doing wrong? Keystore and its password didn't change.

Answer 1

I had the same problem yesterday.

I had to make sure the checkboxes for signature versions where both checked. These both are unchecked by default.