馃悰 The bug
I get this screen on a page visit, when I import anything from @nuxtjs/composition-api.
I'll do my best to provide a reproduction repo soon.

This appears during build and it might be connected:
ERROR Failed to compile with 3 errors
This dependency was not found:
* fs in ./node_modules/fs-extra/lib/index.js, ./node_modules/graceful-fs/graceful-fs.js and 1 other
Can you share a reproduction link / repro?
@MartinMalinda This error normally indicates you haven't added @nuxtjs/composition-api to your buildModules array.
@MartinMalinda, I second @danielroe's answer. Solved it for me regarding the fs error.
@MartinMalinda I'm closing this but do let me know if you can reproduce this error with the module in your buildModules array.
@danielroe hi
Added to buildModules but still getting error:
WARN in ./node_modules/@nuxt/utils/dist/utils.js friendly-errors 22:15:48
Critical dependency: the request of a dependency is an expression friendly-errors 22:15:48
friendly-errors 22:15:48
ERROR Failed to compile with 3 errors friendly-errors 22:15:48
This dependency was not found: friendly-errors 22:15:48
friendly-errors 22:15:48
* fs in ./node_modules/fs-extra/lib/index.js, ./node_modules/graceful-fs/graceful-fs.js and 1 other friendly-errors 22:15:48
friendly-errors 22:15:48
To install it, you can run: npm install --save fs
I use spa (ssr: false) mode
"nuxt": "^2.14.6"
"@nuxtjs/composition-api": "^0.13.0"
UPD:
Sorry, my fault
I had and alias in webpackConfig:
'@vue/composition-api': require.resolve('@nuxtjs/composition-api')
Wanted to get a backward compatibility with @vue/composition-api
@crutch12 I think you could actually do that, but amend to
'@vue/composition-api': require.resolve('@nuxtjs/composition-api/lib/entrypoint.js')
Most helpful comment
@MartinMalinda This error normally indicates you haven't added
@nuxtjs/composition-apito yourbuildModulesarray.