问Vue组件引发错误:无法设置未定义的属性“”render“”

EN

Uncaught TypeError: Cannot set property 'render' of undefined
    at normalizeComponent (componentNormalizer.js?2877:24)...

<template src="./QuestionnairesList.html"></template>
<script>
import Header from "../../Global/Header";
import { questionnairesService } from "../../../services/questionnairesService";
import { diseasesService } from '../../../services/diseasesService';

export default {
  name: "QuestionnairesList",
  components: {
    Header
  },
   async created() {
    this.loading = true
    this.questionnairesFilter = await this.$store.getters.questionnairesFilter;
    this.$store.dispatch("searchQuestionnaires");
    // this.loading = false
  },
  data() {
    return {
      loading: null,
      questionnairesFilter: {},
    };
  },
  computed: {
    questionnaires() {
      this.loading = true
      const diseasesMap = this.$store.getters.diseasesMap;

      let ques = this.$store.getters.questionnaires.questionnaires || [];
      ques.forEach(preScreener => {
          let dxKey = diseasesService.getDiseaseKey(preScreener.disease);
          if (diseasesMap[dxKey]) {
                preScreener.disease_name = diseasesMap[dxKey].disease_name ;
                preScreener.sub_disease_name = diseasesMap[dxKey].sub_disease_name;
          }
      });
      this.loading = false
      return ques;
    },
    total() {
      return this.$store.getters.questionnaires.total;
    },
    pages() {
      return Math.ceil(
        this.$store.getters.questionnaires.total /
          this.questionnairesFilter.page_size
      );
    },
    IsLoading(){
        return this.loading
    }
  },


  methods: {
    onQueryKeyUp() {
      if (
        this.questionnairesFilter.query == "" ||
        this.questionnairesFilter.query.length > 1
      ) {
        this.questionnairesFilter.page = 1;
      }
      this.loading = true;
      this.$store.dispatch("searchQuestionnaires").then(() => {
        this.loading = false;
      });
    },
    onPageChange: function(pageNo) {
      this.loading = true
      this.questionnairesFilter.page = pageNo;
      this.$store.dispatch("searchQuestionnaires");
      this.loading = false
    },
    onNewQuestionnaire: function() {
      this.$store.dispatch(
        "setQuestionnaire",
        questionnairesService.getEmptyQuestionnaire()
      );
      this.$router.push({ name: "AddQuestionnaire" });
    },
    onQuestionnaireSelected: function(qu) {
      this.$router.push({ name: "EditQuestionnaire", params: { id: qu.id } });
    }
  }
};
</script>