diff --git a/src/CraneCtld/CtldGrpcServer.cpp b/src/CraneCtld/CtldGrpcServer.cpp
index 5033ef774..fda7b2d66 100644
--- a/src/CraneCtld/CtldGrpcServer.cpp
+++ b/src/CraneCtld/CtldGrpcServer.cpp
@@ -977,6 +977,11 @@ CtldServer::SubmitTaskToScheduler(std::unique_ptr<TaskInCtld> task) {
         g_task_scheduler->SubmitTaskAsync(std::move(task));
     return {std::move(future)};
   }
+
+  if (result.has_error()) {
+    CRANE_DEBUG("Task submission failed. Reason: {}.", result.error().second);
+    return result::fail(result.error().second);
+  }
 }
 
 }  // namespace Ctld