Problem: version correspondence
solution:

uninstall node sass

npm uninstall node-sass

install version 4.14.1

npm install [email protected]

network problems may occur during installation. Taobao image can be used. It is recommended to use the following methods. It is not recommended to permanently use Taobao image
single use

npm install --registry=https://registry.npm.taobao.org

if you still cannot install, you can find the corresponding version number in the package.json file and modify it directly. The version number I use here is
node sass: 4.14.1
sass loader: 7.1.3
generally, the idea will remind the update dependency in the lower right corner, otherwise the node will be deleted directly_ Download the modules folder again

Reference link 1
reference link 2