Console error: Can't find selectize

[andrewwise]

Getting the following error in my browser console:

Uncaught Error: Module build failed (from ./node_modules/sass-loader/dist/cjs.js):
SassError: Can't find stylesheet to import.
   ╷
20 │ @import "selectize";
   │         ^^^^^^^^^^^
   ╵
  app/javascript/stylesheets/active_admin.scss 20:9  root stylesheet

Have I missed an install step?

The imports are included in app/javascript/stylesheets/active_admin.scss is that correct?

@import "selectize";
@import "selectize.default";
@import "activeadmin-ajax_filter";