Mehr Bilder zur Collection hinzufügen (FormKit)

I have the following Collection in my form:

@tracked formData = {
  images: []
};

...

<form.Button @action={{fn form.addItemToCollection "images" ""}}>
  Add image
</form.Button>
<form.Collection @name="images" as |collection index|>
  <collection.Field
    @name={{concat "image_" index}}
    @title={{concat "Image " index}}
    as |field|
  >
    <field.Image @type="composer" />
    <form.Button @action={{fn collection.remove index}}>
      Remove image
    </form.Button>
  </collection.Field>
</form.Collection>

And then I’m trying to get all the images in my handleSubmit().

The issue is, when clicking ‘Add image’, I get this error:

Uncaught DOMException: Failed to execute 'querySelector' on 'Document': '#f3fb8bf6-b5c2-429a-8fbe-9f71e53d2320-images.0.image_0 .uploaded-image-preview' is not a valid selector.
    at Object.uploadDropTargetOptions (https://global.discourse-cdn.com/themecreator/assets/chunk.035772c00c44639860d5.d41d8cd9.br.js:384:39233)
    at get #y (https://global.discourse-cdn.com/themecreator/assets/chunk.035772c00c44639860d5.d41d8cd9.br.js:1:9152)
    at x.setup (https://global.discourse-cdn.com/themecreator/assets/chunk.035772c00c44639860d5.d41d8cd9.br.js:1:4021)
    at q._join (https://global.discourse-cdn.com/themecreator/assets/chunk.035772c00c44639860d5.d41d8cd9.br.js:21:17128)
    at q.join (https://global.discourse-cdn.com/themecreator/assets/chunk.035772c00c44639860d5.d41d8cd9.br.js:21:14790)
    at p (https://global.discourse-cdn.com/themecreator/assets/chunk.035772c00c44639860d5.d41d8cd9.br.js:338:146675)
    at https://global.discourse-cdn.com/themecreator/assets/chunk.035772c00c44639860d5.d41d8cd9.br.js:338:146721
    at Object.installModifier (https://global.discourse-cdn.com/themecreator/assets/chunk.035772c00c44639860d5.d41d8cd9.br.js:66:84012)
    at https://global.discourse-cdn.com/themecreator/assets/chunk.035772c00c44639860d5.d41d8cd9.br.js:66:7863
    at Z (https://global.discourse-cdn.com/themecreator/assets/chunk.035772c00c44639860d5.d41d8cd9.br.js:60:61995)
    at K.install (https://global.discourse-cdn.com/themecreator/assets/chunk.035772c00c44639860d5.d41d8cd9.br.js:66:7856)
    at https://global.discourse-cdn.com/themecreator/assets/chunk.035772c00c44639860d5.d41d8cd9.br.js:40:122872
    at X (https://global.discourse-cdn.com/themecreator/assets/chunk.035772c00c44639860d5.d41d8cd9.br.js:60:61939)
    at eG.commit (https://global.discourse-cdn.com/themecreator/assets/chunk.035772c00c44639860d5.d41d8cd9.br.js:40:122865)
    at eQ.commit (https://global.discourse-cdn.com/themecreator/assets/chunk.035772c00c44639860d5.d41d8cd9.br.js:40:124154)
    at eX (https://global.discourse-cdn.com/themecreator/assets/chunk.035772c00c44639860d5.d41d8cd9.br.js:40:124387)
    at tG._renderRoots (https://global.discourse-cdn.com/themecreator/assets/chunk.035772c00c44639860d5.d41d8cd9.br.js:115:366762)
    at tG._renderRootsTransaction (https://global.discourse-cdn.com/themecreator/assets/chunk.035772c00c44639860d5.d41d8cd9.br.js:115:367140)
    at tG._revalidate (https://global.discourse-cdn.com/themecreator/assets/chunk.035772c00c44639860d5.d41d8cd9.br.js:115:367607)
    at invoke (https://global.discourse-cdn.com/themecreator/assets/chunk.035772c00c44639860d5.d41d8cd9.br.js:21:11212)
    at m.flush (https://global.discourse-cdn.com/themecreator/assets/chunk.035772c00c44639860d5.d41d8cd9.br.js:21:10302)
    at g.flush (https://global.discourse-cdn.com/themecreator/assets/chunk.035772c00c44639860d5.d41d8cd9.br.js:21:12018)
    at q._end (https://global.discourse-cdn.com/themecreator/assets/chunk.035772c00c44639860d5.d41d8cd9.br.js:21:16776)
    at q.end (https://global.discourse-cdn.com/themecreator/assets/chunk.035772c00c44639860d5.d41d8cd9.br.js:21:14195)
    at q._runExpiredTimers (https://global.discourse-cdn.com/themecreator/assets/chunk.035772c00c44639860d5.d41d8cd9.br.js:21:18050)

The ‘Add image’ button adds the upload field, but it’s stuck at 0%. Clicking ‘Remove’ does nothing, with no error.

Any help is appreciated!

File link: discourse-post-image-carousel/javascripts/discourse/components/modal/create-carousel-modal.gjs at main · NateDhaliwal/discourse-post-image-carousel · GitHub