Module build failed #content($material-light) vuetify 2.3.10 - vue.js

Question

I am upgrading from vuetify version 1.0.5 to 2.3.10. I have removed node-sass and using sass as per the documentation. I am getting this error as below. I have included my package.json file. Any idea where I could be wrong?
./node_modules/css-loader!./node_modules/sass-loader/lib/loader.js!./node_modules/vuetify/src/styles/main.sass
Module build failed:
#content($material-light)
^
Invalid CSS after " #content": expected "}", was "($material-light); "
in /Users/weather/ceolaw/node_modules/vuetify/src/styles/tools/_theme.sass (line 3, column 5)
# ./node_modules/vuetify/src/styles/main.sass 2:14-102
# ./node_modules/vuetify/es5/presets/default/index.js
package.json file
{
"name": "weather",
"private": true,
"engines": {
"node": "^10.0.0",
"yarn": "^1.21.1"
},
"dependencies": {
"#rails/webpacker": "^3.2.0",
"#riophae/vue-treeselect": "^0.0.38",
"axios": "^0.17.1",
"babel-polyfill": "^6.26.0",
"coffee-loader": "^0.9.0",
"coffeescript": "1.12.7",
"es6-promise": "^4.2.2",
"pdfjs-dist": "2.0.550",
"sass": "^1.26.11",
"sass-loader": "^6.0.6",
"scroll-into-view-if-needed": "^2.2.14",
"urijs": "^1.19.1",
"vue": "^2.6.12",
"vue-ads-table-tree": "^2.3.2",
"vue-analytics": "^5.9.0",
"vue-moment": "^4.0.0-0",
"vue-quill-editor": "^3.0.6",
"vue-router": "^3.0.1",
"vue-spinner": "^1.0.3",
"vue-star-rating": "^1.6.0",
"vuetify": "^2.3.10",
"yarn": "^1.22.5"
},
"devDependencies": {
"caniuse-lite": "^1.0.30000855",
"css-loader": "^0.28.11",
"jshint": "^2.9.5",
"jshint-loader": "^0.8.4",
"vue-loader": "^13.6.2",
"vue-template-compiler": "^2.6.12",
"webpack-dev-server": "^2.9.7"
},
"scripts": {
"client": "./bin/webpack-dev-server",
"server": "bundle exec rails s",
"start": "./bin/webpack-dev-server"
}
}
Error update
yarn remove node-sass
yarn remove v1.21.1
[1/2] 🗑 Removing module node-sass...
error This module isn't specified in a package.json file.

Answer 1

It seems one of your other dependencies has a dependency on node-sass. It's probably #rails/webpacker as you are using very old version 3.2.0 (current is 5.2.1) and they switched to sass (dart-sass) recently
Result is you have both packages installed - sass and node-sass
From the docs of sass-loader (which is used by Webpack when building Vue app) it seems that when both packages are installed, they prefer sass over node-sass but at the same time warn not to install both. Seems strange to me. Also the error suggests that sass-loader is in your case preferring node-sass.
You have 2 options:
upgrade #rails/webpacker to newer version which is using sass
configure sass-loader to use sass as documented here