Feature flag __VUE_PROD_HYDRATION_MISMATCH_DETAILS__ is not explicitly defined.

vue.config.js文件中

增加 VUE_PROD_HYDRATION_MISMATCH_DETAILS: false,

const { defineConfig } = require("@vue/cli-service");
module.exports = defineConfig({
  transpileDependencies: true,
  chainWebpack: (config) => {
    config.plugin("define").tap((definitions) => {
      Object.assign(definitions[0], {
        __VUE_OPTIONS_API__: "true",
        __VUE_PROD_DEVTOOLS__: false,
        __VUE_PROD_HYDRATION_MISMATCH_DETAILS__: false,
      });
      return definitions;
    });
  },
});

参考：https://vuejs.org/api/compile-time-flags