Expected behavior creating Text that changes font-size according to screensize

Actual behavior when adding the import-code from documentation about RFS to scss it does not work. @import "core/bootstrap/rfs";

ERROR in ./src/styles.scss (./node_modules/css-loader/dist/cjs.js??ref--13-1!./node_modules/postcss-loader/src??embedded!./node_modules/sass-loader/dist/cjs.js??ref--13-3!./src/styles.scss) Module build failed (from ./node_modules/sass-loader/dist/cjs.js): SassError: Can't find stylesheet to import. ? 1 │ @import "core/bootstrap/rfs"; │ ^^^^^^^^^^^^^^^^^^^^ ?

Resources (screenshots, code snippets etc.) It is described in the documentation, but i think there is some missing step that has to be done to get import working https://mdbootstrap.com/docs/angular/content/responsive-font-size/