What's up with my template?

[ThatBlockyPenguin]

Hi all, I'm getting the following error when trying to include a partial. If I remove the partial include statement, it compiles fine. Note that layouts are working fine still.

TypeError: Cannot read properties of undefined (reading 'file')
    at Eta.eval (eval at compile (https://jsr.io/@eta-dev/eta/3.4.0/src/compile.ts:13:12), <anonymous>:3:17)
    at Eta.render (https://jsr.io/@eta-dev/eta/3.4.0/src/render.ts:58:26)
    at include (eval at compile (https://jsr.io/@eta-dev/eta/3.4.0/src/compile.ts:13:12), <anonymous>:4:40)
    at Eta.eval (eval at compile (https://jsr.io/@eta-dev/eta/3.4.0/src/compile.ts:13:12), <anonymous>:16:12)
    at Eta.render (https://jsr.io/@eta-dev/eta/3.4.0/src/render.ts:58:26)
    at Eta.renderString (https://jsr.io/@eta-dev/eta/3.4.0/src/render.ts:91:17)
    at file:///home/blockypenguin/Dev/LocalDeno/Excellent/webapp/server.ts:30:37
    at dispatch (https://deno.land/x/oak@v16.1.0/middleware.ts:90:13)
    at https://deno.land/x/oak@v16.1.0/router.ts:1327:20
    at dispatch (https://deno.land/x/oak@v16.1.0/middleware.ts:90:13)

Here is my eta document:

<% layout('__template.eta', { title: 'Upload', bodyTags: 'data-js-area=form' }) %>

<main>
  <h2>Upload CSV</h2>

  <%~ include('__nojs.eta') %>

  <form action="/upload" method="post" enctype="multipart/form-data" hidden>
    <input type="file" name="csv" accept=".csv,.xlsx" required>
    <input type="submit" value="Upload">
  </form>
</main>

<section>
  <output></output>
</section>

<div class="alert-area"></div>

And here is my folder structure:

What am I doing wrong?