After upgrading to this beta version, I was unable to build and run my app for Android.

I think the error below is the root cause.

>  Product type is not an application, not building an APK.

The selected target was my app (not a library, which is the usual cause for this error in my experience). 

After downgrading to 17.0.1, the app was built and installed successfully on my Nokia Android phone.

I ran build/clean and re-ran CMake with "Initial configuration" before each build on both versions of Qt Creator.

The project I worked on: https://github.com/jgaa/next-app