/~app path doesn't load index.html; index.js doesn't render fully

[basilesportif]

When I create a new app with CLA and start it, it shows up on the Home screen, but clicking to /~myapp gives a 404.

If I manually enter /~myapp/index.html, I do get the app page, but only the header (see attached screenshot).

[matildepark]

This is because /index.html is not in the router:

This is an upstream issue for urbit/urbit, and I will file.