Default Android Studio 0.4.3 Gradle Problem Could not open no_buildscript class

Hi,

i have Android Studio 0.4.3 installed, also gradle 1.10.
I downloaded a project from GitHub. After that I selected a build.gradle file to open the project in Android Studio.
But then an error comes up: 'Could not open no_buildscript class...', see attached image.

What goes wrong here? Thanks for any help!
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