diff --git a/controller/task_video.go b/controller/task_video.go
index 3f2c9588..a2c2431d 100644
--- a/controller/task_video.go
+++ b/controller/task_video.go
@@ -104,9 +104,7 @@ func updateVideoSingleTask(ctx context.Context, adaptor channel.TaskAdaptor, cha
 		case "succeed":
 			task.Status = model.TaskStatusSuccess
 			task.Progress = "100%"
-			if url, err := adaptor.(interface {
-				ParseResultUrl(map[string]any) (string, error)
-			}).ParseResultUrl(responseItem); err == nil {
+			if url, err := adaptor.ParseResultUrl(responseItem); err == nil {
 				task.FailReason = url
 			} else {
 				common.LogWarn(ctx, fmt.Sprintf("Failed to get url from body for task %s: %s", task.TaskID, err.Error()))
diff --git a/relay/channel/task/kling/adaptor.go b/relay/channel/task/kling/adaptor.go
index 9c6773f5..9ea58728 100644
--- a/relay/channel/task/kling/adaptor.go
+++ b/relay/channel/task/kling/adaptor.go
@@ -107,7 +107,7 @@ func (a *TaskAdaptor) BuildRequestURL(info *relaycommon.TaskRelayInfo) (string,
 func (a *TaskAdaptor) BuildRequestHeader(c *gin.Context, req *http.Request, info *relaycommon.TaskRelayInfo) error {
 	token, err := a.createJWTToken()
 	if err != nil {
-		token = info.ApiKey // fallback
+		return fmt.Errorf("failed to create JWT token: %w", err)
 	}
 
 	req.Header.Set("Content-Type", "application/json")