fix: bug

src/modules/question/components/QuestionImportEdit.vue

@@ -1196,7 +1196,7 @@ export default {
               if (selectedAnswer.includes(subq.quesAnswer)) {
                 errorQuestionIndexs.push(`${question.number}-${sindex + 1}`);
               } else {
-                if (subq.quesAnswer !== "[]")
+                if (subq.quesAnswer && subq.quesAnswer !== "[]")
                   selectedAnswer.push(subq.quesAnswer);
               }
             });