Drupal 8添加和扩展资产库的问题

我试图构建Drupal 8主题，但在资产库方面遇到了一些问题。

该站点保持白色，apache错误日志抛出php异常：

Uncaught PHP Exception Drupal''Core''Asset''Exception''InvalidLibrariesExtendSpecificationException: "The specified library "radweiser/main-style" does not exist." at /Users/****/Sites/dev/radweiser/web/core/lib/Drupal/Core/Asset/LibraryDiscoveryCollector.php line 168

我使用引导程序Drupal 8主题作为我的基本主题。以下是我的主题为radweiser:的yml文件

radweiser.info.yml

name: radweiser
type: theme
description: Drupal 8 Theme
version: 0.1.0
core: 8.x
base theme: bootstrap
screenshot: images/screenshot.png
libraries:
- radweiser/global-styling
- radweiser/main-style
libraries-extend:
  bootstrap/base-theme:
    - radweiser/main-style
regions:
  navigation: 'Navigation'
  navigation_collapsible: 'Navigation (Collapsible)'
  header: 'Top Bar'
  highlighted: 'Highlighted'
  help: 'Help'
  content: 'Content'
  sidebar_first: 'Primary'
  sidebar_second: 'Secondary'
  footer: 'Footer'
  page_top: 'Page top'
  page_bottom: 'Page bottom'

radweiser.libraries.yml

global-styling:
  version: VERSION
  css:
    theme:
      styles/global.css: {}
main-styles:
  version: VERSION
  css:
    theme:
      styles/main.css: {}

有人知道这个问题吗？