diff --git a/rhodecode/api/__init__.py b/rhodecode/api/__init__.py
--- a/rhodecode/api/__init__.py
+++ b/rhodecode/api/__init__.py
@@ -137,7 +137,7 @@ def exception_view(exc, request):
     rpc_id = getattr(request, 'rpc_id', None)
 
     if isinstance(exc, JSONRPCError):
-        fault_message = safe_str(exc.message)
+        fault_message = safe_str(exc)
         log.debug('json-rpc error rpc_id:%s "%s"', rpc_id, fault_message)
     elif isinstance(exc, JSONRPCValidationError):
         colander_exc = exc.colander_exception
diff --git a/rhodecode/api/views/server_api.py b/rhodecode/api/views/server_api.py
--- a/rhodecode/api/views/server_api.py
+++ b/rhodecode/api/views/server_api.py
@@ -272,7 +272,7 @@ def cleanup_sessions(request, apiuser, o
             older_than_seconds=older_than_seconds)
         return {'sessions_removed': cleaned, 'backend': backend}
     except user_sessions.CleanupCommand as msg:
-        return {'cleanup_command': msg.message, 'backend': backend}
+        return {'cleanup_command': str(msg), 'backend': backend}
     except Exception as e:
         log.exception('Failed session cleanup')
         raise JSONRPCError(
diff --git a/rhodecode/apps/admin/views/sessions.py b/rhodecode/apps/admin/views/sessions.py
--- a/rhodecode/apps/admin/views/sessions.py
+++ b/rhodecode/apps/admin/views/sessions.py
@@ -83,7 +83,7 @@ class AdminSessionSettingsView(BaseAppVi
                 older_than_seconds=older_than_seconds)
             h.flash(_('Cleaned up old sessions'), category='success')
         except user_sessions.CleanupCommand as msg:
-            h.flash(msg.message, category='warning')
+            h.flash(str(msg), category='warning')
         except Exception as e:
             log.exception('Failed session cleanup')
             h.flash(_('Failed to cleanup up old sessions'), category='error')