in this error occur during my installation 
Hi, are you using two step verification on your google account? Please check the website referenced in the error, to see options what might be causing this.
If you’re using two step verification you either have to disabled this security setting or generate an app specific password for use with eM Client, if you do this, you have to setup your account using your generated password.
If you’re not using the two step verification, try to check this setting, https://www.google.com/settings/security/lesssecureapps, and check if you have the option set to enable, if you do, try to set the option to enable and check if the issue persists.
Thank you,
Paul