Nuxt UI v3 as layer

I'm not able to use layer that contains Nuxt UI v.3
Problem is with css import in

nuxt.config.ts

nuxt.config.ts

. Once I try to run dev command, there is an error 500:

'~/assets/css/main.css' can't be found

'~/assets/css/main.css' can't be found

'~/assets/css/main.css' can't be found

'~/assets/css/main.css' can't be found.
Does running v3 as layer requires some extra approach?