skip webhook not found

app/jobs/send_form_completed_webhook_request_job.rb

@@ -8,8 +8,13 @@ class SendFormCompletedWebhookRequestJob
   MAX_ATTEMPTS = 12
 
   def perform(params = {})
-    submitter = Submitter.find(params['submitter_id'])
-    webhook_url = WebhookUrl.find(params['webhook_url_id'])
+    submitter = Submitter.find_by(id: params['submitter_id'])
+
+    return unless submitter
+
+    webhook_url = WebhookUrl.find_by(id: params['webhook_url_id'])
+
+    return unless webhook_url
 
     attempt = params['attempt'].to_i