diff --git a/flytekit/clients/grpc_utils/auth_interceptor.py b/flytekit/clients/grpc_utils/auth_interceptor.py
index e467801a77..6a73e0764e 100644
--- a/flytekit/clients/grpc_utils/auth_interceptor.py
+++ b/flytekit/clients/grpc_utils/auth_interceptor.py
@@ -61,6 +61,8 @@ def intercept_unary_unary(
         fut: grpc.Future = continuation(updated_call_details, request)
         e = fut.exception()
         if e:
+            if not hasattr(e, "code"):
+                raise e
             if e.code() == grpc.StatusCode.UNAUTHENTICATED or e.code() == grpc.StatusCode.UNKNOWN:
                 self._authenticator.refresh_credentials()
                 updated_call_details = self._call_details_with_auth_metadata(client_call_details)