Thanks for reporting, but it appears to be an issue with npx/npm. Try clearing npx caches and re-installing the package. Also try using the latest npm version.

error: [ERR_MODULE_NOT_FOUND] Cannot find module 'file:///Users/dahlia/Library/Caches/deno/npm/registry.npmjs.org/khroma/2.1.0/dist/channels/utils/index.js' imported ...