diff --git a/HMCL/src/main/java/org/jackhuang/hmcl/ui/construct/TaskExecutorDialogPane.java b/HMCL/src/main/java/org/jackhuang/hmcl/ui/construct/TaskExecutorDialogPane.java
index bc1dc5520..4ce0b9be0 100644
--- a/HMCL/src/main/java/org/jackhuang/hmcl/ui/construct/TaskExecutorDialogPane.java
+++ b/HMCL/src/main/java/org/jackhuang/hmcl/ui/construct/TaskExecutorDialogPane.java
@@ -88,7 +88,9 @@ public class TaskExecutorDialogPane extends BorderPane {
 
         btnCancel.setOnAction(e -> {
             Optional.ofNullable(executor).ifPresent(TaskExecutor::cancel);
-            onCancel.getCancellationAction().accept(this);
+            if (onCancel.getCancellationAction() != null) {
+                onCancel.getCancellationAction().accept(this);
+            }
         });
 
         speedEventHandler = speedEvent -> {