First Post .. Issues in upgrading Android to 4.1.3 and running first project

After upgrading to 4.1.3, went thru the tutorial that comes up in the studio ( link   ) 

 Error:Cause: unable to find valid certification path to requested target google search said that this is inability of android to find a proper certificate. Company certificate needs to be imported to Android cert repo (for e.g., https://stackoverflow.com/questions/42415666/errorcause-unable-to-find-valid-certification-path-to-requested-target ) So, imported ZScaler certificate using MS Edge - Settings (search for certs) and keep going. - Export to a file - import in Android Studio by going to File - Settings - Server certs.. (this is diff in earlier Android Studio versions)

Error in Android Phone simulation