我有一个用于 Angular 项目的 CI/CD 管道，昨天运行良好，但今天相同的代码在构建中返回了几个错误：
\n./src/styles.scss.webpack[javascript/auto]!=!./node_modules/css-loader/dist/cjs.js??ruleSet[1].rules[6].rules[0].oneOf[0].use[1]!./node_modules/postcss-loader/dist/cjs.js??ruleSet[1].rules[6].rules[0].oneOf[0].use[2]!./node_modules/resolve-url-loader/index.js??ruleSet[1].rules[6].rules[1].use[0]!./node_modules/sass-loader/dist/cjs.js??ruleSet[1].rules[6].rules[1].use[1]!./src/styles.scss\n- Error: Module build failed (from ./node_modules/sass-loader/dist/cjs.js): SassError: Undefined variable.\n \xe2\x95\xb7 142 \xe2\x94\x82 values: $utilities-border-colors\n \xe2\x94\x82 ^^^^^^^^^^^^^^^^^^^^^^^^\n \xe2\x95\xb5 node_modules\\bootstrap\\scss\\_utilities.scss 142:15 @import src\\styles.scss 7:9 root stylesheet\n\n./src/styles.scss - Error: Module build failed (from ./node_modules/mini-css-extract-plugin/dist/loader.js):\nHookWebpackError: Module build failed (from ./node_modules/sass-loader/dist/cjs.js):\nSassError: Undefined variable.\n \xe2\x95\xb7\n142 \xe2\x94\x82 values: $utilities-border-colors\n \xe2\x94\x82 ^^^^^^^^^^^^^^^^^^^^^^^^\n \xe2\x95\xb5\n node_modules\\bootstrap\\scss\\_utilities.scss 142:15 @import\n src\\styles.scss 7:9 root stylesheet\n at tryRunOrWebpackError (C:\\User\\user\\project\\node_modules\\webpack\\lib\\HookWebpackError.js:88:9)\n at __webpack_require_module__ (C:\\User\\user\\project\\node_modules\\webpack\\lib\\Compilation.js:4979:12)\n at __webpack_require__ (C:\\User\\user\\project\\node_modules\\webpack\\lib\\Compilation.js:4936:18)\n at C:\\User\\user\\project\\node_modules\\webpack\\lib\\Compilation.js:5007:20\n at symbolIterator (C:\\User\\user\\project\\node_modules\\neo-async\\async.js:3485:9)\n at done (C:\\User\\user\\project\\node_modules\\neo-async\\async.js:3527:9)\n at Hook.eval [as callAsync] …