Didn’t load AppCompat ActionBar with unknown error STUDIO 3.0

HOTFIX: “compileSdkVersion ” MUST aswell modified with the identical model.
Exemple:
compileSdkVersion 27
buildToolsVersion ‘27.0.0’
compile ‘com.android.assist:appcompat-v7:27.0.0’

A fast repair for those who began working in android studio and simply upgraded to Android Studio 3.Zero secure model. On outdated aplications you simply need to edit construct.gradle to the lastest model as within the video.

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