npm run build errors

[keefer223]

npm run build fails to build - multiple errors

$ npm run build

[email protected] build /home/keefer/scala-electron-gui-2.0.0
quasar build -m electron -t mat

Build mode........ electron
Quasar theme...... mat
Quasar CLI........ v0.17.26
Quasar Framework.. v0.17.20
Debugging......... no

app:quasar-conf Reading quasar.conf.js +0ms
app:webpack Extending Renderer process Webpack config +13s
app:webpack Extending Main process Webpack config +4ms
app:artifacts Cleaned build artifact: "/home/keefer/scala-electron-gui-2.0.0/dist/electron-mat" +80ms
app:generator Generating Webpack entry point +36ms
app:build Building... +29ms

Renderer process █████████████████ building [68%] 872/896 modules 24 active
Main process █████████████████████████ [100%] in ~2m

Renderer process █████████████████████████ [100%] in ~5m
Main process █████████████████████████ [100%] in ~2m

app:artifacts Added build artifact "/home/keefer/scala-electron-gui-2.0.0/dist/electron-mat" +5m

Entrypoint app = js/vendor.js js/app.js

WARNING in ./src/components/tx_details.vue?vue&type=template&id=25e865c4& (./node_modules/vue-loader/lib/loaders/templateLoader.js??vue-loader-options!./node_modules/vue-loader/lib??vue-loader-options!./src/components/tx_details.vue?vue&type=template&id=25e865c4&)
Module Warning (from ./node_modules/vue-loader/lib/loaders/templateLoader.js):
(Emitted value instead of an instance of Error) : component lists rendered with v-for should have explicit keys. See https://vuejs.org/guide/list.html#key for more info.
@ ./src/components/tx_details.vue?vue&type=template&id=25e865c4& 1:0-208 1:0-208
@ ./src/components/tx_details.vue
@ ./node_modules/babel-loader/lib??ref--1-0!./node_modules/vue-loader/lib??vue-loader-options!./src/components/tx_list.vue?vue&type=script&lang=js&
@ ./src/components/tx_list.vue?vue&type=script&lang=js&
@ ./src/components/tx_list.vue
@ ./node_modules/babel-loader/lib??ref--1-0!./node_modules/vue-loader/lib??vue-loader-options!./src/pages/wallet/txhistory.vue?vue&type=script&lang=js&
@ ./src/pages/wallet/txhistory.vue?vue&type=script&lang=js&
@ ./src/pages/wallet/txhistory.vue
@ ./src/router/routes.js
@ ./src/router/index.js
@ ./.quasar/app.js
@ ./.quasar/client-entry.js
@ multi ./.quasar/client-entry.js

WARNING in ./src/components/settings.vue?vue&type=template&id=33b17486& (./node_modules/vue-loader/lib/loaders/templateLoader.js??vue-loader-options!./node_modules/vue-loader/lib??vue-loader-options!./src/components/settings.vue?vue&type=template&id=33b17486&)
Module Warning (from ./node_modules/vue-loader/lib/loaders/templateLoader.js):
(Emitted value instead of an instance of Error) : component lists rendered with v-for should have explicit keys. See https://vuejs.org/guide/list.html#key for more info.
@ ./src/components/settings.vue?vue&type=template&id=33b17486& 1:0-206 1:0-206
@ ./src/components/settings.vue
@ ./node_modules/babel-loader/lib??ref--1-0!./node_modules/vue-loader/lib??vue-loader-options!./src/layouts/wallet-select/main.vue?vue&type=script&lang=js&
@ ./src/layouts/wallet-select/main.vue?vue&type=script&lang=js&
@ ./src/layouts/wallet-select/main.vue
@ ./src/router/routes.js
@ ./src/router/index.js
@ ./.quasar/app.js
@ ./.quasar/client-entry.js
@ multi ./.quasar/client-entry.js

WARNING in ./src/components/settings.vue?vue&type=template&id=33b17486& (./node_modules/vue-loader/lib/loaders/templateLoader.js??vue-loader-options!./node_modules/vue-loader/lib??vue-loader-options!./src/components/settings.vue?vue&type=template&id=33b17486&)
Module Warning (from ./node_modules/vue-loader/lib/loaders/templateLoader.js):
(Emitted value instead of an instance of Error) : component lists rendered with v-for should have explicit keys. See https://vuejs.org/guide/list.html#key for more info.
@ ./src/components/settings.vue?vue&type=template&id=33b17486& 1:0-206 1:0-206
@ ./src/components/settings.vue
@ ./node_modules/babel-loader/lib??ref--1-0!./node_modules/vue-loader/lib??vue-loader-options!./src/layouts/wallet-select/main.vue?vue&type=script&lang=js&
@ ./src/layouts/wallet-select/main.vue?vue&type=script&lang=js&
@ ./src/layouts/wallet-select/main.vue
@ ./src/router/routes.js
@ ./src/router/index.js
@ ./.quasar/app.js
@ ./.quasar/client-entry.js
@ multi ./.quasar/client-entry.js

ERROR in ./src/components/mainmenu.vue?vue&type=style&index=0&lang=scss& (./node_modules/css-loader??ref--7-oneOf-2-1!./node_modules/vue-loader/lib/loaders/stylePostLoader.js!./node_modules/postcss-loader/src??ref--7-oneOf-2-2!./node_modules/sass-loader/dist/cjs.js??ref--7-oneOf-2-3!./node_modules/vue-loader/lib??vue-loader-options!./src/components/mainmenu.vue?vue&type=style&index=0&lang=scss&)
Module build failed (from ./node_modules/sass-loader/dist/cjs.js):
Error: Node Sass version 6.0.1 is incompatible with ^4.0.0.