diff --git a/src/components/CodemirrorEditor/UploadImgDialog.vue b/src/components/CodemirrorEditor/UploadImgDialog.vue
index c9ee1c1..b5f2222 100644
--- a/src/components/CodemirrorEditor/UploadImgDialog.vue
+++ b/src/components/CodemirrorEditor/UploadImgDialog.vue
@@ -257,7 +257,7 @@ function beforeImageUpload(file: File) {
   // check image
   const checkResult = checkImage(file)
   if (!checkResult.ok) {
-    toast.error(checkResult.msg)
+    toast.error(checkResult.msg || ``)
     return false
   }
   // check image host