diff --git a/staffeln/common/openstack.py b/staffeln/common/openstack.py
index 0e639e1..efdb060 100644
--- a/staffeln/common/openstack.py
+++ b/staffeln/common/openstack.py
@@ -48,9 +48,10 @@
         members = self.get_role_assignments(project_id)
         emails = []
         for member in members:
-            user = self.get_user(member.user)
-            if user and user.email:
-                emails.append(user.email)
+            if member.user and "id" in member.user:
+                user = self.get_user(member.user["id"])
+                if user and hasattr(user, "email"):
+                    emails.append(user.email)
         return emails
 
     def get_projects(self):
diff --git a/staffeln/conductor/backup.py b/staffeln/conductor/backup.py
index 1d38b4e..8df0f57 100755
--- a/staffeln/conductor/backup.py
+++ b/staffeln/conductor/backup.py
@@ -174,11 +174,11 @@
                 "project_id": project_id,
             }
         )
-        LOG.info("Start purge completed tasks.")
+        LOG.debug(f"Start purge completed tasks for project {project_id}")
         for queue in success_tasks:
             queue.delete_queue()
 
-        LOG.info("Start purge failed tasks.")
+        LOG.debug(f"Start purge failed tasks for project {project_id}")
         for queue in failed_tasks:
             queue.delete_queue()
 
diff --git a/staffeln/conductor/result.py b/staffeln/conductor/result.py
index 98e3c05..2bb0f57 100644
--- a/staffeln/conductor/result.py
+++ b/staffeln/conductor/result.py
@@ -45,14 +45,14 @@
                         f"No email can be found from members of project {project_id}. "
                         "Skip report now and will try to report later."
                     )
-                    return
+                    return False
             except Exception as ex:
                 LOG.warn(
                     f"Failed to fetch emails from project members with exception: {ex}"
                     "As also no receiver email or project receiver domain are "
                     "configured. Will try to report later."
                 )
-                return
+                return False
         else:
             receiver_domain = CONF.notification.project_receiver_domain
             receiver = f"{project_name}@{receiver_domain}"
@@ -164,4 +164,6 @@
         if reported:
             # Record success report
             self.create_report_record()
-        return True
+            return True
+        else:
+            return False