I am having trouble with vue kitchen sink

I was trying to open vue kitchen sink with npm run vue:dev command, but I encountered an error with normalize.js

Starting ‘ks-vue’…
‘C:UserlueintDocumentsBlueWebsiteFirebase_Vue
ramework7-demo
untimeplugin-vue
ormalize.js’ is imported by kitchen-sink\vue\src\app.vue, but could not be resolved – treating it as an external dependency
‘C:UserlueintDocumentsBlueWebsiteFirebase_Vue
ramework7-demo
untimeplugin-vue
ormalize.js’ is imported by kitchen-sink\vue\src\pages\home.vue, but could not be resolved – treating it as an external dependency

How could I solve this issue?
Thanks for comments.

Try downgrade “rollup-plugin-vue” to 5.1.1