Error: "Dashboard" is not a valid value for --theme

Error: "Dashboard" is not a valid value for --theme

我尝试了几次按照此处的教程创建自己的烘焙主题: https://book.cakephp.org/bake/1/en/development.html#creating-a-bake-theme

当我尝试 运行 我的主题 Dashboard 时,我得到这些:

Error: "Dashboard" is not a valid value for --theme. Please use one of "Bake, Migrations, WyriHaximus/TwigView"
Error: "DashboardTheme" is not a valid value for --theme. Please use one of "Bake, Migrations, WyriHaximus/TwigView"

我尝试了以下命令:

cake bake all --theme Dashboard clients
cake bake all --theme DashboardTheme clients

我的文件结构:

插件未加载,缺少 bootstrap() 中的语句。