Flutter 无效参数：找不到其中的可执行文件。：flatter

我正试图通过以下方式安装和设置颤振 1.我下载了颤振和解压 2.在环境变量中添加颤振路径和bin文件夹 3.消防指挥扑动医生

然后通过命令行下载了dart，然后我得到了错误

Oops；颤振意外退出：“无效参数：找不到where的可执行文件。”。由于次要错误，无法生成崩溃报告：参数无效：找不到where的可执行文件。
请随时通知我们https://github.com/flutter/flutter/issues.                                                        未处理的异常：ProcessExit:1#0 HandletToolError（包：颤振工具/runner.dart:149:7）#1#asyncErrorWrapperHelper.errorCallback（dart:async patch/async#patch.dart:87:64）#2#rootRunBinary（dart:async/zone.dart:1204:38）#3#CustomZone.runBinary（dart:async/zone.dart:1093:19）#4#FutureListener.handleError（dart:async/future\u impl.dart:155:20）#5 future.#传播到Listeners.handleError（dart:async/future\u impl.dart:694:47）#6未来。#传播到侦听器（dart:async/Future\u impl.dart:715:24）#7未来。#完整错误（dart:async/Future\u impl.dart:534:5）#835uAsyncWaiteComplete错误（dart:async patch/async_patch.dart:43:15）#9#informuserofscrash（包：flatter_tools/runner.dart）#10#asyncErrorWrapperHelper.errorCallback（dart:async patch/async_patch.dart:87:64）#11#（dart:async/zone.dart:1204:38）#12 CustomZone.runBinary（dart:async/zone.dart:1093:19）#13 FutureListener.handleError（dart:async/future\uImpl.dart:155:20）#14未来。#传播侦听器.handleError（dart:async/Future\u impl.dart:694:47）#15未来。#传播侦听器（dart:async/Future\u impl.dart:715:24）#16未来。#（dart:async/future_impl.dart:534:5）#17_asyncWaitCompleter.completeError（dart:async patch/async_patch.dart:43:15）#18_doctorText（包：flatter_tools/runner.dart）#19#asyncErrorWrapperHelper.errorCallback（dart:async patch/async#patch.dart:87:64）#20#rootRunBinary（dart:async/zone.dart:1204:38）#21#CustomZone.runBinary（dart:async/zone.dart:1093:19）#22#FutureListener.handleError（dart:async/future\u impl.dart:155:20）#23 future。#传播到Listeners.handleError（dart:async/future\u impl.dart:694:47）#24 Future.#传播到侦听器（dart:async/Future\u impl.dart:715:24）#25 Future.#completeeerror（dart:async/Future\u impl.dart:534:5）#2635uasyncwaitecompleteeerror（dart:async patch/async_patch.dart:43:15）#27 AppContext.run（包：flatter_tools/src/base/context.dart）#28#asyncErrorWrapperHelper.errorCallback（dart:async patch/async_patch.dart:87:64）#29#（dart:async/zone.dart:1204:38）#30 CustomZone.runBinary（dart:async/zone.dart:1093:19）#31 FutureListener.handleError（dart:async/future\uImpl.dart:155:20）#32未来。#传播侦听器.handleError（dart:async/Future\u impl.dart:694:47）#33未来。#传播侦听器（dart:async/Future\u impl.dart:715:24）#34未来。#（dart:async/future_impl.dart:534:5）#35_asyncwaitcompleter.completeeerror（dart:async patch/async_patch.dart:43:15）#36 AppContext.run。（包：flatter_tools/src/base/context.dart）#37#asyncErrorWrapperHelper.errorCallback（dart:async patch/async#patch.dart:87:64）#38#rootRunBinary（dart:async/zone.dart:1204:38）#39#CustomZone.runBinary（dart:async/zone.dart:1093:19）#40#FutureListener.handleError（dart:async/future\u impl.dart:155:20）#41 future.#传播到Listeners.handleError（dart:async/future\u impl.dart:694:47）#42 future.#