Handle file upload errors without response.body (#7047)

GitOrigin-RevId: a6c06bac5a74d2d4e9ea9c65f5d62b105e17ef24

services/web/frontend/js/features/file-tree/components/file-tree-create/modes/file-tree-upload-doc.js

@@ -105,7 +105,8 @@ export default function FileTreeUploadDoc() {
               break
 
             default:
-              setError(response.body.error)
+              console.error(error)
+              setError(response.body?.error || 'generic_something_went_wrong')
               break
           }
         })