I know this a duplicated question but i didn't find any answer validated for the problem .
I made the all the solutions in this question: Android Studio 3.0 - Unable to save settings: Failed to save settings. Please restart Android Studio but what if my project wasn't a local project and is a remote project on Git .
every time i pull the master from git , this problem is showed up .
the problem was also in Version 3.0 even after updating the Studio my version of Android Studio is 3.0.1