Gradle is failing on syncing my project in the new Android Studio 2.0

Question

I have just upgraded (i.e., installed a full new version) my Android Studio from 1.5 to 2.0. The upgrade seemed to go smoothly, but I am having trouble with my project when

Answer 1

For me it was a connection issue, that I have checked my connection is working in the same second I have enabled and disabled offline Gradle, then Android Studio download the needed files

NB: My Connection was disconnecting and reconnecting many times, so i figured out that this error was caused by the connection specially it was not the same time it takes when trying to sync my Gradle