Merge pull request #1838 from IFRCGo/feature/fix-sentry-issue-1

Fix Sentry issue 1

Author: szabozoltan69

registrations/views.py

@@ -21,6 +21,8 @@
 
 
 def is_valid_domain(email):
+    if email is None:
+        return False
     domain = email.lower().split('@')[1]
     is_allowed = (
         DomainWhitelist.objects