Android Basics: tip-calculator

[cunzwincun]

URL of codelab
https://developer.android.com/codelabs/basic-android-kotlin-training-tip-calculator?continue=https%3A%2F%2Fdeveloper.android.com%2Fcourses%2Fpathways%2Fandroid-basics-kotlin-unit-2-pathway-1%23codelab-https%3A%2F%2Fdeveloper.android.com%2Fcodelabs%2Fbasic-android-kotlin-training-tip-calculator#2

In which task and step of the codelab can this issue be found?
Enable view binding
Open the app's build.gradle file ( Gradle Scripts > build.gradle (Module: Tip_Time.app) )
In the android section, add the following lines:

buildFeatures {
viewBinding = true
}
Note the message Gradle files have changed since last project sync.
Press Sync Now.
aa49f2389f1d1b19.png

After a few moments, you should see a message at the bottom of the Android Studio window, Gradle sync finished. You can close the build.gradle file if you want.

Describe the problem
After I press sync now, there is error which said:
Could not find method buildFeatures() for arguments [build_6hbjfzkgik4klt1kynznmzit6$_run_closure1@55a48724] on project ':app' of type org.gradle.api.Project

Steps to reproduce?

1. Go to...
2. Click on...
3. See error...

Versions
Android Studio version:
API version of the emulator:

Additional information
Include screenshots if they would be useful in clarifying the problem.

[cunzwincun]

Not reading this clearly:

In the android section, add the following lines: