Nuxt UI pro not working at all

I followed the exact setup what i see on https://ui.nuxt.com/getting-started/installation/pro/nuxt, however its just not working i keep getting the following error:

Cannot find module '~/assets/css/main.css' imported from 'virtual:nuxt:C%3A%2FUsers%2Fsteno%2FDocuments%2FGitHub%2Fnuxttest%2F.nuxt%2Fcss.mjs'.

Cannot find module '~/assets/css/main.css' imported from 'virtual:nuxt:C%3A%2FUsers%2Fsteno%2FDocuments%2FGitHub%2Fnuxttest%2F.nuxt%2Fcss.mjs'.

if i understand correctly you dont need a license for just testing it right? as long as you dont put it up online