fix on cron jobs - invalid class name

smash/smash/settings.py

@@ -75,7 +75,7 @@ TEMPLATES = [
 CRON_CLASSES = [
     'web.views.kit.KitRequestEmailSendJob',
     'web.redcap_connector.RedCapRefreshJob',
-    'web.voucher_expiry_job',
+    'web.views.voucher.ExpireVouchersJob',
 ]
 
 # Password validation