Google Apps Script provides Triggers for users to specify callback function based on spreadsheet events. When you add a trigger to your Spreadsheet it also adds failure notification option. In case of trigger failure an email message “Summary of failures for Google Apps Script” will be sent to the configured email address about the failure of the script. If you are using the Triggers for internal testing purpose and do not wish to receive any failure notification then you can turn off the message. In the Script editor window, click the Triggers menu and select Current script’s triggers or All your triggers menu option.
Navigate to the Trigger and click on the notification link available next to your Trigger.
This would display the following Execution failure notifications window.
To turn off the message, click the cross mark before the email address and remove the entry. This would display that there is no notification setup.
If you wish only to reduce the frequency of failure notification that is sent to your email address then you change it from daily to weekly.