Twitter bootstrap Bootstrap 4 beta 2-模块构建失败，因为$color2

我从beta版更新到beta-2版，在运行

npm run dev

时，我在导入引导程序时收到以下错误，如下所示：

@import "~bootstrap/scss/bootstrap";

错误：

ERROR in ./resources/assets/app/sass/vendor.scss
Module build failed: ModuleBuildError: Module build failed:
  @return mix($color-base, $color, $level * $theme-color-interval);
         ^
      Argument `$color-2` of `mix($color-1, $color-2, $weight: 50%)` must be a color

Backtrace:
        node_modules/bootstrap/scss/_functions.scss:85, in function `mix`
        node_modules/bootstrap/scss/_functions.scss:85, in function `theme-color-level`
        node_modules/bootstrap/scss/_tables.scss:96
      in /Users/chrisbreuer/Documents/code/ordering/node_modules/bootstrap/scss/_functions.scss (line 85, column 11)
    at runLoaders (/Users/chrisbreuer/Documents/code/ordering/node_modules/webpack/lib/NormalModule.js:195:19)
    at /Users/chrisbreuer/Documents/code/ordering/node_modules/loader-runner/lib/LoaderRunner.js:364:11
    at /Users/chrisbreuer/Documents/code/ordering/node_modules/loader-runner/lib/LoaderRunner.js:230:18
    at context.callback (/Users/chrisbreuer/Documents/code/ordering/node_modules/loader-runner/lib/LoaderRunner.js:111:13)
    at Object.asyncSassJobQueue.push [as callback] (/Users/chrisbreuer/Documents/code/ordering/node_modules/sass-loader/lib/loader.js:55:13)
    at Object.<anonymous> (/Users/chrisbreuer/Documents/code/ordering/node_modules/async/dist/async.js:2244:31)
    at Object.callback (/Users/chrisbreuer/Documents/code/ordering/node_modules/async/dist/async.js:906:16)
    at options.error (/Users/chrisbreuer/Documents/code/ordering/node_modules/node-sass/lib/index.js:294:32)
 @ multi ./resources/assets/app/js/app.js ./resources/assets/app/sass/app.scss ./resources/assets/app/sass/vendor.scss

ERROR in ./resources/assets/app/sass/vendor.scss
Module build failed: ModuleBuildError: Module build failed:
  @return mix($color-base, $color, $level * $theme-color-interval);
         ^
      Argument `$color-2` of `mix($color-1, $color-2, $weight: 50%)` must be a color

Backtrace:
        node_modules/bootstrap/scss/_functions.scss:85, in function `mix`
        node_modules/bootstrap/scss/_functions.scss:85, in function `theme-color-level`
        node_modules/bootstrap/scss/_tables.scss:96
      in /Users/chrisbreuer/Documents/code/ordering/node_modules/bootstrap/scss/_functions.scss (line 85, column 11)
    at runLoaders (/Users/chrisbreuer/Documents/code/ordering/node_modules/webpack/lib/NormalModule.js:195:19)
    at /Users/chrisbreuer/Documents/code/ordering/node_modules/loader-runner/lib/LoaderRunner.js:364:11
    at /Users/chrisbreuer/Documents/code/ordering/node_modules/loader-runner/lib/LoaderRunner.js:230:18
    at context.callback (/Users/chrisbreuer/Documents/code/ordering/node_modules/loader-runner/lib/LoaderRunner.js:111:13)
    at Object.asyncSassJobQueue.push [as callback] (/Users/chrisbreuer/Documents/code/ordering/node_modules/sass-loader/lib/loader.js:55:13)
    at Object.<anonymous> (/Users/chrisbreuer/Documents/code/ordering/node_modules/async/dist/async.js:2244:31)
    at Object.callback (/Users/chrisbreuer/Documents/code/ordering/node_modules/async/dist/async.js:906:16)
    at options.error (/Users/chrisbreuer/Documents/code/ordering/node_modules/node-sass/lib/index.js:294:32)
 @ ./resources/assets/app/sass/vendor.scss
 @ multi ./resources/assets/app/js/app.js ./resources/assets/app/sass/app.scss ./resources/assets/app/sass/vendor.scss

./resources/assets/app/sass/vendor.scss中的

错误
模块生成失败：模块生成错误：模块生成失败：
@返回混合（$color base、$color、$level*$主题颜色间隔）；
^
“mix（$color-1，$color-2，$weight:50%）”的参数“$color-2”必须是颜色
回溯：
node_modules/bootstrap/scss/_函数。scss:85，在函数'mix'中`
node_modules/bootstrap/scss/_函数。scss:85，在函数`主题颜色级别`
节点模块/引导/scss/_表。scss:96
在/Users/chrisbreuer/Documents/code/ordering/node_modules/bootstrap/scss/_functions.scss中（第85行第11列）
运行加载程序（/Users/chrisbreuer/Documents/code/ordering/node_modules/webpack/lib/NormalModule.js:195:19）
at/Users/chrisbreuer/Documents/code/ordering/node_modules/loader runner/lib/LoaderRunner.js:364:11
at/Users/chrisbreuer/Documents/code/ordering/node_modules/loader runner/lib/LoaderRunner.js:230:18
在context.callback（/Users/chrisbreuer/Documents/code/ordering/node_modules/loader runner/lib/LoaderRunner.js:111:13）
在Object.asyncsjsjobqueue.push[as callback]（/Users/chrisbreuer/Documents/code/ordering/node_modules/sass loader/lib/loader.js:55:13）
反对。（/Users/chrisbreuer/Documents/code/ordering/node_modules/async/dist/async.js:2244:31）
在Object.callback（/Users/chrisbreuer/Documents/code/ordering/node\u modules/async/dist/async.js:906:16）
在options.error（/Users/chrisbreuer/Documents/code/ordering/node_modules/node sass/lib/index.js:294:32）
@multi./resources/assets/app/js/app.js./resources/assets/app/sass/app.scss./resources/assets/app/sass/vendor.scss
./resources/assets/app/sass/vendor.scss中出错
模块生成失败：模块生成错误：模块生成失败：
@返回混合（$color base、$color、$level*$主题颜色间隔）；
^
“mix（$color-1，$color-2，$weight:50%）”的参数“$color-2”必须是颜色
回溯：
node_modules/bootstrap/scss/_函数。scss:85，在函数'mix'中`
node_modules/bootstrap/scss/_函数。scss:85，在函数`主题颜色级别`
节点模块/引导/scss/_表。scss:96
在/Users/chrisbreuer/Documents/code/ordering/node_modules/bootstrap/scss/_functions.scss中（第85行第11列）
运行加载程序（/Users/chrisbreuer/Documents/code/ordering/node_modules/webpack/lib/NormalModule.js:195:19）
at/Users/chrisbreuer/Documents/code/ordering/node_modules/loader runner/lib/LoaderRunner.js:364:11
at/Users/chrisbreuer/Documents/code/ordering/node_modules/loader runner/lib/LoaderRunner.js:230:18
在context.callback（/Users/chrisbreuer/Documents/code/ordering/node_modules/loader runner/lib/LoaderRunner.js:111:13）
在Object.asyncsjsjobqueue.push[as callback]（/Users/chrisbreuer/Documents/code/ordering/node_modules/sass loader/lib/loader.js:55:13）
反对。（/Users/chrisbreuer/Documents/code/ordering/node_modules/async/dist/async.js:2244:31）
在Object.callback（/Users/chrisbreuer/Documents/code/ordering/node\u modules/async/dist/async.js:906:16）
在options.error（/Users/chrisbreuer/Documents/code/ordering/node_modules/node sass/lib/index.js:294:32）
@./resources/assets/app/sass/vendor.scss
@multi./resources/assets/app/js/app.js./resources/assets/app/sass/app.scss./resources/assets/app/sass/vendor.scss

---

这是一个引导错误还是我需要采取进一步的步骤来定义某个地方？我似乎找不到任何东西来追踪这个问题。

你是如何解决的？