Hi there,

May I know where are you hitting this error? and it seems you still using the old version of EasySocial, would you mind to update to the latest version?

Hello Muhammad,

I've update my ES now.

We see this error with Group Announcements and Notifications broadcasts either in groups or where it's sent by admin site wide.

Thanks,

Michael

Try download my attached file and replace into JoomlaFolder\administrator\components\com_easysocial\tables\mailer.php and see how it goes?