[MM-40342] Fix panic in Mattermost Server for cloud installations (#19046)

* Add a small change to trigger spinwick update

* Change if statement to fix panic

* Undo changes

* simplify logic

jobs/resend_invitation_email/worker.go

@@ -109,7 +109,7 @@ func (rseworker *ResendInvitationEmailWorker) Execute(job *model.Job, elapsedTim
 		}
 	}
 
-	if (elapsedTimeSinceSchedule > firstDuration) && (systemValue.Value == "0") {
+	if (elapsedTimeSinceSchedule > firstDuration) && (systemValue == nil || systemValue.Value == "0") {
 		rseworker.ResendEmails(job, "48")
 		rseworker.setNumResendEmailSent(job, "1")
 	} else if elapsedTimeSinceSchedule > secondDuration {