What is Error:screenSize" />?

I was getting the same error but project run successfully

the problem occurred whenever I collapse tag

for example

 <activity
            android:name=".DetailActivity"
            android:configChanges="keyboardHidden|screenSize|orientation" />

then i did like this

<activity
            android:name=".DetailActivity"
            android:configChanges="keyboardHidden|screenSize|orientation"></activity>

now error disappears and Android Studio gives me warning "XML tag has empty body"

No exact solution found

Tested on

Android Studio 3.0.1