Php Magento 2，收到一个错误："；未为突变配置架构。”；而呼叫变异

我在graphql中有以下变异（创建新客户-类似于用户注册）：

它是从Magento 2.4文档中复制和粘贴的：

当我尝试进行其他突变呼叫时，我得到了相同的错误：

{
  "errors": [
    {
      "message": "Schema is not configured for mutations.",
      "locations": [
        {
          "line": 1,
          "column": 1
        }
      ],
      "stack": [
        "GraphQLError: Schema is not configured for mutations.",
        "    at getOperationRootType (/home/marcin/projects/a24store/frontend/node_modules/graphql/utilities/getOperationRootType.js:28:13)",
        "    at executeOperation (/home/marcin/projects/a24store/frontend/node_modules/graphql/execution/execute.js:210:61)",
        "    at executeImpl (/home/marcin/projects/a24store/frontend/node_modules/graphql/execution/execute.js:104:14)",
        "    at execute (/home/marcin/projects/a24store/frontend/node_modules/graphql/execution/execute.js:64:35)",
        "    at /home/marcin/projects/a24store/frontend/node_modules/express-graphql/index.js:152:16",
        "    at processTicksAndRejections (internal/process/task_queues.js:97:5)"
      ]
    }
  ],
  "extensions": {}
}

我的Magento 2设置是正确的，因为其他查询（如获取产品、类别等的查询）正在运行，并给出了正确的响应。 我正在使用Magento 2.4版本的干净安装

Magento文档甚至没有提到后端代码中的更改。但我发现了这样的东西：。有一个章节叫做：“在Magento GraphQL中启用突变”

---

所以我认为我应该在一些模块中扩展或更改graphql模式。但我不知道在哪和哪里。

查询是只读的。。。公共数据。。。可能必须配置突变、用户授权和应用某些ACL。。。运行/与一些就绪/预配置的配置（docker）进行比较。。。在github上发布一个问题？我知道必须配置突变，但我不知道是哪个和在哪里。Magento医生甚至没有提到类似的事情。我还报告了github：

{
  "errors": [
    {
      "message": "Schema is not configured for mutations.",
      "locations": [
        {
          "line": 1,
          "column": 1
        }
      ],
      "stack": [
        "GraphQLError: Schema is not configured for mutations.",
        "    at getOperationRootType (/home/marcin/projects/a24store/frontend/node_modules/graphql/utilities/getOperationRootType.js:28:13)",
        "    at executeOperation (/home/marcin/projects/a24store/frontend/node_modules/graphql/execution/execute.js:210:61)",
        "    at executeImpl (/home/marcin/projects/a24store/frontend/node_modules/graphql/execution/execute.js:104:14)",
        "    at execute (/home/marcin/projects/a24store/frontend/node_modules/graphql/execution/execute.js:64:35)",
        "    at /home/marcin/projects/a24store/frontend/node_modules/express-graphql/index.js:152:16",
        "    at processTicksAndRejections (internal/process/task_queues.js:97:5)"
      ]
    }
  ],
  "extensions": {}
}