使用npm run dev时遇到此错误：
98% after emitting SizeLimitsPlugin
ERROR Failed to compile with 1 errors 9:16:24 PM
This dependency was not found:
* -!../../node_modules/css-loader/index.js??ref--5-2!../../node_modules/postcss-loader/src/index.js??postcss0!./custom in ./node_modules/css-loader??ref--5-2!./node_modules/postcss-loader/src??postcss0!./resources/css/app.css
To install it, you can run: npm install --save -!../../node_modules/css-loader/index.js??ref--5-2!../../node_modules/postcss-loader/src/index.js??postcss0!./custom
Asset Size Chunks Chunk Names
/js/app.js 598 KiB /js/app [emitted] /js/app
ERROR in ./resources/css/app.css
Module build failed (from ./node_modules/css-loader/index.js):
ModuleNotFoundError: Module not found: Error: Can't resolve './custom' in 'F:\App\xampp\htdocs\basic\basic-website\resources\css'
at F:\App\xampp\htdocs\basic\basic-website\node_modules\webpack\lib\Compilation.js:925:10
at F:\App\xampp\htdocs\basic\basic-website\node_modules\webpack\lib\NormalModuleFactory.js:401:22
at F:\App\xampp\htdocs\basic\basic-website\node_modules\webpack\lib\NormalModuleFactory.js:130:21
at F:\App\xampp\htdocs\basic\basic-website\node_modules\webpack\lib\NormalModuleFactory.js:224:22
at F:\App\xampp\htdocs\basic\basic-website\node_modules\neo-async\async.js:2830:7
at F:\App\xampp\htdocs\basic\basic-website\node_modules\neo-async\async.js:6877:13
at F:\App\xampp\htdocs\basic\basic-website\node_modules\webpack\lib\NormalModuleFactory.js:214:25
at F:\App\xampp\htdocs\basic\basic-website\node_modules\enhanced-resolve\lib\Resolver.js:213:14
at F:\App\xampp\htdocs\basic\basic-website\node_modules\enhanced-resolve\lib\Resolver.js:285:5
at eval (eval at create (F:\App\xampp\htdocs\basic\basic-website\node_modules\tapable\lib\HookCodeFactory.js:33:10), <anonymous>:13:1)
at F:\App\xampp\htdocs\basic\basic-website\node_modules\enhanced-resolve\lib\UnsafeCachePlugin.js:44:7
at F:\App\xampp\htdocs\basic\basic-website\node_modules\enhanced-resolve\lib\Resolver.js:285:5
at eval (eval at create (F:\App\xampp\htdocs\basic\basic-website\node_modules\tapable\lib\HookCodeFactory.js:33:10), <anonymous>:13:1)
at F:\App\xampp\htdocs\basic\basic-website\node_modules\enhanced-resolve\lib\Resolver.js:285:5
at eval (eval at create (F:\App\xampp\htdocs\basic\basic-website\node_modules\tapable\lib\HookCodeFactory.js:33:10), <anonymous>:25:1)
at F:\App\xampp\htdocs\basic\basic-website\node_modules\enhanced-resolve\lib\DescriptionFilePlugin.js:67:43
at F:\App\xampp\htdocs\basic\basic-website\node_modules\enhanced-resolve\lib\Resolver.js:285:5
at eval (eval at create (F:\App\xampp\htdocs\basic\basic-website\node_modules\tapable\lib\HookCodeFactory.js:33:10), <anonymous>:14:1)
at F:\App\xampp\htdocs\basic\basic-website\node_modules\enhanced-resolve\lib\Resolver.js:285:5
at eval (eval at create (F:\App\xampp\htdocs\basic\basic-website\node_modules\tapable\lib\HookCodeFactory.js:33:10), <anonymous>:25:1)
at F:\App\xampp\htdocs\basic\basic-website\node_modules\enhanced-resolve\lib\DescriptionFilePlugin.js:67:43
at F:\App\xampp\htdocs\basic\basic-website\node_modules\enhanced-resolve\lib\Resolver.js:285:5
at eval (eval at create (F:\App\xampp\htdocs\basic\basic-website\node_modules\tapable\lib\HookCodeFactory.js:33:10), <anonymous>:14:1)
at F:\App\xampp\htdocs\basic\basic-website\node_modules\enhanced-resolve\lib\Resolver.js:285:5
at eval (eval at create (F:\App\xampp\htdocs\basic\basic-website\node_modules\tapable\lib\HookCodeFactory.js:33:10), <anonymous>:13:1)
at F:\App\xampp\htdocs\basic\basic-website\node_modules\enhanced-resolve\lib\DirectoryExistsPlugin.js:27:15
at F:\App\xampp\htdocs\basic\basic-website\node_modules\enhanced-resolve\lib\CachedInputFileSystem.js:85:15
at processTicksAndRejections (internal/process/task_queues.js:79:11)
@ ./resources/css/app.css
ERROR in ./resources/css/app.css (./node_modules/css-loader??ref--5-2!./node_modules/postcss-loader/src??postcss0!./resources/css/app.css)
Module not found: Error: Can't resolve './custom' in 'F:\App\xampp\htdocs\basic\basic-website\resources\css'
@ ./resources/css/app.css (./node_modules/css-loader??ref--5-2!./node_modules/postcss-loader/src??postcss0!./resources/css/app.css) 3:10-137
@ ./resources/css/app.css
npm ERR! code ELIFECYCLE
npm ERR! errno 2
npm ERR! @ development: `cross-env NODE_ENV=development node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js`
npm ERR! Exit status 2
npm ERR!
npm ERR! Failed at the @ development script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\pc\AppData\Roaming\npm-cache\_logs\2020-10-21T17_46_24_559Z-debug.log
npm ERR! code ELIFECYCLE
npm ERR! errno 2
npm ERR! @ dev: `npm run development`
npm ERR! Exit status 2
npm ERR!
npm ERR! Failed at the @ dev script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\pc\AppData\Roaming\npm-cache\_logs\2020-10-21T17_46_24_640Z-debug.log
我用Google搜索问题，但找不到解决方法
如果我降级到laravel 7会解决问题吗？
有人可以帮助我吗？