Add the following to /home/cwhisperer/AndroidProjects/vosim/android/app/build.gradle.kts:

    android {
        ndkVersion = "27.0.12077973"
        ...
    }

But in my build.gradle.kts I have

android {
    namespace = "lu.vo.bla"
    compileSdk = flutter.compileSdkVersion
    ndkVersion = flutter.ndkVersion

do I have to replace the variable?