In fact, the module gulp-minify-css installed long ago, only the version is outdated.
This error crashes if new versions of installed modules. After the upgrade(re-installation) of the specified module everything works fine. Only if the modules of more than 10 pieces, have them update every. Tell me how to update everything.
Use bellow commands (I have used in Ubuntu)
sudo npm install gulp-minify-css
important :
sudo npm install 'modules to be install'