fix

src/modules/questions/views/EditPaper.vue

@@ -959,6 +959,8 @@ export default {
         })
         .catch((error) => {
           this.answerMessage = error.response.data.desc;
+          this.dialogAnswerFile = false;
+          document.getElementById("answerFile").value = "";
           this.uploadAnswerLoading = false;
         });
     },