I now just have a depreciation warning, and I can’t figure out what’s triggering it:
DEPRECATION: Passing the `@class` argument to <LinkTo> is deprecated. Instead, please pass the attribute directly, i.e. `<LinkTo class={{...}} />` instead of `<LinkTo @class={{...}} />` or `{{link-to class=...}}`. [deprecation id: ember.built-in-components.legacy-attribute-arguments] See https://deprecations.emberjs.com/v3.x#toc_ember-built-in-components-legacy-attribute-arguments for more details.
(Component still doesn’t work, so I’m chasing this now)