Error reported when one member tried donating to another member. Please help urgently as we have quite active system for donations
UnderflowException: lang_not_exists__mailsub__membersshop_notification_donate_donations (0)
#0 /home/carnity/public_html/carnity.com/system/Email/Email.php(471): IPS\_Lang->get('mailsub__member...')
#1 /home/carnity/public_html/carnity.com/system/Email/Email.php(811): IPS\_Email->compileSubject(Object(IPS\Member), Object(IPS\Lang))
#2 /home/carnity/public_html/carnity.com/system/Notification/Notification.php(574): IPS\_Email->mergeAndSend(Array, NULL, NULL, Array, Object(IPS\Lang))
#3 /home/carnity/public_html/carnity.com/system/Notification/Notification.php(555): IPS\_Notification->sendEmails(Array, Array)
#4 /home/carnity/public_html/carnity.com/applications/membersshop/modules/front/shop/main.php(305): IPS\_Notification->send()
#5 /home/carnity/public_html/carnity.com/system/Dispatcher/Controller.php(85): IPS\membersshop\modules\front\shop\_main->donatepoints()
#6 /home/carnity/public_html/carnity.com/applications/membersshop/modules/front/shop/main.php(25): IPS\Dispatcher\_Controller->execute()
#7 /home/carnity/public_html/carnity.com/system/Dispatcher/Dispatcher.php(152): IPS\membersshop\modules\front\shop\_main->execute()
#8 /home/carnity/public_html/carnity.com/index.php(13): IPS\_Dispatcher->run()
#9 {main}
BACKTRACE
#0 /home/carnity/public_html/carnity.com/init.php(894): IPS\_Log::log('UnderflowExcept...', 'uncaught_except...')
#1 [internal function]: IPS\IPS::exceptionHandler(Object(UnderflowException))
#2 {main}