我正在尝试访问 firebase 中的实时数据库，但它向我显示了此错误Uncaught Error: Service database is not available。我已经搜索过这可能意味着什么，但我找不到任何有用的或解决方案。
这是我的代码：
window.addPerson = addPerson;
const queryString = window.location.search;
const urlParams = new URLSearchParams(queryString);
const userVar = urlParams.get('user')
const userVarSplitted = userVar.split('#')
const userVarFormatted = userVarSplitted[0] + ":" + userVarSplitted[1]
// Import the functions you need from the SDKs you need
import { initializeApp } from "https://www.gstatic.com/firebasejs/9.6.4/firebase-app.js";
import { getAnalytics } from "https://www.gstatic.com/firebasejs/9.6.4/firebase-analytics.js";
import { getDatabase, ref, set } from "https://www.gstatic.com/firebasejs/9.1.0/firebase-database.js";
// TODO: Add SDKs for Firebase products that you …