I opened up Android Studio today and for the first time I saw this error:
Error:Cannot find JAR 'core-3.1.1.jar' required by module 'gradle-jetty' using classpath or distribution directory '/Applications/Android Studio.app/Contents/gradle/gradle-2.14.1'
I have tried, restarted both my Mac and Android Studio but yet I still get this error. Can anyone help me?
I had the same problem, follow the answered detailed here to uninstall, and then just re-install. Before importing any existing projects just create a dummy project to ensure that everything finishes installing correctly.
Then simply just tell your antivirus that the project folder for android studio is excluded from the virus searches.