diff --git a/src/services/pythonCliAuth.ts b/src/services/pythonCliAuth.ts
index d6f0548..7ddfb64 100644
--- a/src/services/pythonCliAuth.ts
+++ b/src/services/pythonCliAuth.ts
@@ -167,7 +167,7 @@ class PythonCliAuth {
         }
       }
 
-      throw new Error(response.error || response.message || 'Registration failed');
+      throw new Error(data?.message || 'Registration failed');
     } catch (error) {
       console.error('Registration failed:', error);
       throw error;