Gulp выдает ошибку при concat-css, minifyCSS?
Не пойму почему такое происходит? Отдельно файл он конкатенируют. Ругается на следующее:
events.js:72
throw er; // Unhandled 'error' event
^
TypeError: Cannot use 'in' operator to search for 'keepSpecialComments' in bundle.min.css
at CleanCSS.minify (C:\WebDev\Education\node_modules\gulp-minify-css\node_modules\clean-css\lib\clean.js:88:30)
at CleanCSS.minify (C:\WebDev\Education\node_modules\gulp-minify-css\node_modules\clean-css\lib\clean.js:75:19)
at minify (C:\WebDev\Education\node_modules\gulp-minify-css\index.js:25:33)
at DestroyableTransform.modifyContents [as _transform] (C:\WebDev\Education\node_modules\gulp-minify-css\index.js:79:25)
at DestroyableTransform.Transform._read (C:\WebDev\Education\node_modules\gulp-minify-css\node_modules\through2\node_modules\readable-stream\lib\_stream_transform.js:184:10)
at DestroyableTransform.Transform._write (C:\WebDev\Education\node_modules\gulp-minify-css\node_modules\through2\node_modules\readable-stream\lib\_stream_transform.js:172:12)
at doWrite (C:\WebDev\Education\node_modules\gulp-minify-css\node_modules\through2\node_modules\readable-stream\lib\_stream_writable.js:237:10)
at writeOrBuffer (C:\WebDev\Education\node_modules\gulp-minify-css\node_modules\through2\node_modules\readable-stream\lib\_stream_writable.js:227:5)
at DestroyableTransform.Writable.write (C:\WebDev\Education\node_modules\gulp-minify-css\node_modules\through2\node_modules\readable-stream\lib\_stream_writable.js:194:11)
at DestroyableTransform.ondata (C:\WebDev\Education\node_modules\gulp-concat-css\node_modules\through2\node_modules\readable-stream\lib\_stream_readable.js:572:20)