Android Studio: failed to complete gradle execution, cause is empty

Question

When I try to run an Android emulator, I get the following error screen. The same occurs when I export the apk. When I go to the directory where the apk will be saved, the a

Answer 1

In my case the root of the problem was, I deleted some resources that some xml files were refering to, and in that case neither of "Clear Project" "Rebuild Project" "Gradle VM Option" or "deleting .gradle folder" helped at all.

What more to say is, none of the mentioned xml files were in use, and no error was displayed anywhere. I only detected the problem when (in desperate) sync'ed Gradle, and then opened the Gradle console and scrolled up and read the red error lines.