diff --git a/src/stores/files.ts b/src/stores/files.ts
index 009e841..bcde0f3 100644
--- a/src/stores/files.ts
+++ b/src/stores/files.ts
@@ -217,7 +217,8 @@ export const useFilesStore = defineStore("filesStore", {
         this.$router.push({ name: "Files" });
       } catch (error) {
         if (error.response?.status === 422) {
-          const detail = [...error.response.data.detail];
+          const raw = error.response.data?.detail;
+          const detail = Array.isArray(raw) ? [...raw] : [];
 
           uploadFailedSecond(detail);
         } else {