QtBuildTask fails with an error

Steps to reproduce:

1. Create a new Android Project
2. Create a new Qt Project
3. Copy the snippets to build.gradle and apply changes to plugins{} and android{} blocks as stated in the code snippet (by QtTAS)
4. Sync and Build Qt Project

Output:

> Task :app:QtBuildTask FAILEDExecution failed for task ':app:QtBuildTask'.
> No signature of method: java.lang.String.listFiles() is applicable for argument types: () values: []
  Possible solutions: lines()