The project was working Fine. But suddenly it throws the following error. app\build . gradle Error : Error : Failed to resolve : com . android . support : support - annotations : 27.0 . 1 Install Repository and sync project Error : Error : Failed to resolve : com . android . support : appcompat - v7 : 27.0 . 1 Install Repository and sync project Error : Error : Failed to resolve : com . android . support : customtabs : 27.0 . 1 Install Repository and sync project Error : Error : Failed to resolve : com . android . support : cardview - v7 : 27.0 . 1 Install Repository and sync project Error : Error : Failed to resolve : com . android . support : support - v4 : 27.0 . 1 Install Repository and sync project Error : Error : Failed to resolve : com . android . support : support - core - utils : 27.0 . 1 Install Repository and sync project Reason: It suddenly shows error because of Facebook has updated the SDK and removed suppor...