安装的flutter和flutter医生工作正常，但是当我运行flutter时：vscode中的新项目显示下面的错误：
[undefined] flutter create --ios-language objc --android-language java .
Waiting for another flutter command to release the startup lock...
Creating project ....
.gitignore (created)
Oops; flutter has exited unexpectedly.
Sending crash report to Google.
Crash report sent (report ID: aa59e1a8c31996c2)
Crash report written to C:\Users\mr\AppData\Local\Temp\flutter_07.log;
please let us know at https://github.com/flutter/flutter/issues.
exit code 1