The error in this windows is: ABI is incompatible, device supports ABIs: x86.
There is only one device available and it is in the 'incompatible' category. I can create a x86_64 android stack example project without errors, but when I build and run the default project I get a pop-up window entitled 'Select Android Device'. JDK 8u221 (using JDK 12 resulted in Qt Creator not finding SDK platform install) Everything besides JDK was installed using Android Studio. I am on MacOS running Qt Creator 4.9.2 based on QT 5.12.4 (Clang 10) 64 bit.