Add As Library BindView Id's getting error

after adding the class file in app Gradle R2, not generating it's showing error i am using below class files classpath "com.android.tools.build:gradle:4.1.0" classpath "com.jakewharton:butterknife-gradle-plugin: 10.2.3"

added in library gradle apply plugin: 'com.android.library' apply plugin: 'com.jakewharton.butterknife'