fix bug

src/modules/questions/views/ImportPaperInfo.vue

@@ -176,7 +176,7 @@ export default {
     },
     uploadError(err) {
       var result = err.message.match(/\{.+}/);
-      var errMessage = JSON.parse(result[0]).desc;
+      var errMessage = JSON.parse(JSON.parse(result[0]).message).desc;
       this.errDialog = true;
       this.errMessage = errMessage;
       this.fileLoading = false;