嗯，安装好了 umi，然后出现了这个错误，卡在 fetch block list
=====以下是错误提示=====
cloud@cloud antd-pro-demo01 % umi block list
WARN [WARN] update jsx: "react" into jsx: "react-jsx" to suport the new JSX transform in React 17 in tsconfig.json
⠸ fetch block list error HTTPError: Response code 404 (Not Found)
at EventEmitter. (/Users/cloud/Documents/web/react/antd-pro-demo01/node_modules/got/source/as-promise.js:74:19)
at processTicksAndRejections (internal/process/task_queues.js:93:5)
⠧ 🚣 fetch block list

=====然后百度有人说可以使用 umi ui ，报错如下=====
cloud@cloud antd-pro-demo01 % umi ui
WARN [WARN] update jsx: "react" into jsx: "react-jsx" to suport the new JSX transform in React 17 in tsconfig.json
run command failed, command ui does not exists.
AssertionError [ERR_ASSERTION]: run command failed, command ui does not exists.
at /Users/cloud/Documents/web/react/antd-pro-demo01/node_modules/@umijs/core/lib/Service/Service.js:667:29
at Generator.next ()
at asyncGeneratorStep (/Users/cloud/Documents/web/react/antd-pro-demo01/node_modules/@umijs/core/lib/Service/Service.js:108:103)
at _next (/Users/cloud/Documents/web/react/antd-pro-demo01/node_modules/@umijs/core/lib/Service/Service.js:110:194)
at /Users/cloud/Documents/web/react/antd-pro-demo01/node_modules/@umijs/core/lib/Service/Service.js:110:364
at new Promise ()
at /Users/cloud/Documents/web/react/antd-pro-demo01/node_modules/@umijs/core/lib/Service/Service.js:110:97
at Service.runCommand (/Users/cloud/Documents/web/react/antd-pro-demo01/node_modules/@umijs/core/lib/Service/Service.js:672:7)
at /Users/cloud/Documents/web/react/antd-pro-demo01/node_modules/@umijs/core/lib/Service/Service.js:648:21
at Generator.next ()

为什么我在命令行 输入 umi block list ,系统提示我 not found umi