Suspicious receiver type; this does not apply to the current receiver of type ApplicationExtension

This occurs when you note the kotlin block inside of the android block, like this:

android {
    // ...
    kotlin {
        compilerOptions {
            jvmTarget.set(JvmTarget.JVM17)
        }
    }
}

android {
    // ...
}
kotlin {
    compilerOptions {
        jvmTarget.set(JvmTarget.JVM17)
    }
}

That said, with AGP 9 you do not even need to provide the jvmTarget explicitily because AGP will set it to android.compileOptions.targetCompatibility by default. If this is the only thing you use the kotlin block for then the proper solution would be to simply remove it entirely.