Unable to fetch some scoped packages

[r1kkert]

I get an error when I try to install the following packages:

NPM: https://www.npmjs.com/package/@nl-rvo/component-library-css
Asset Packagist: https://asset-packagist.org/package/npm-asset/nl-rvo--component-library-css

NPM: https://www.npmjs.com/package/@nl-rvo/design-tokens
Asset Packagist: https://asset-packagist.org/package/npm-asset/nl-rvo--design-tokens

NPM: https://www.npmjs.com/package/@nl-rvo/assets
Asset Packagist: https://asset-packagist.org/package/npm-asset/nl-rvo--assets

I tried to manually fetch the packages on the Asset Packagist website, but this throws an error (Package update failed).

When I try to install one of these packages with composer, I get the following error:

> composer require "npm-asset/nl-rvo--component-library-css:^2.2.2"
...
Problem 1
    - Root composer.json requires npm-asset/nl-rvo--component-library-css, it could not be found in any version, there may be a typo in the package name.

[EvilKarter]

I have the same problem with this package

NPM: https://www.npmjs.com/package/@altcha/crypto
Asset Packagist: https://asset-packagist.org/package/npm-asset/altcha--crypto