diff --git a/apps/dotto/lib/repository/course_registration_repository.dart b/apps/dotto/lib/repository/course_registration_repository.dart
index 95fc3716..0d0229fd 100644
--- a/apps/dotto/lib/repository/course_registration_repository.dart
+++ b/apps/dotto/lib/repository/course_registration_repository.dart
@@ -92,6 +92,12 @@ final class CourseRegistrationRepositoryImpl
       rethrow;
     } on Exception catch (e, stackTrace) {
       throw DomainError.fromException(e: e, stackTrace: stackTrace);
+    } catch (e, stackTrace) {
+      throw DomainError(
+        type: DomainErrorType.unknown,
+        message: e.toString(),
+        stackTrace: stackTrace,
+      );
     }
   }
 
@@ -113,6 +119,12 @@ final class CourseRegistrationRepositoryImpl
       rethrow;
     } on Exception catch (e, stackTrace) {
       throw DomainError.fromException(e: e, stackTrace: stackTrace);
+    } catch (e, stackTrace) {
+      throw DomainError(
+        type: DomainErrorType.unknown,
+        message: e.toString(),
+        stackTrace: stackTrace,
+      );
     }
   }
 
@@ -131,6 +143,12 @@ final class CourseRegistrationRepositoryImpl
       rethrow;
     } on Exception catch (e, stackTrace) {
       throw DomainError.fromException(e: e, stackTrace: stackTrace);
+    } catch (e, stackTrace) {
+      throw DomainError(
+        type: DomainErrorType.unknown,
+        message: e.toString(),
+        stackTrace: stackTrace,
+      );
     }
   }
 }