[Rails 6 alpha] Sprockets::FileNotFound

Steps to reproduce

  1. Create Rails 6 app
  2. yarn add onsenui
  3. Add below lines to “app/assets/stylesheets/application.css”
     *= require onsenui/css/onsenui
*= require onsenui/css/onsen-css-components

  1. Create a sample view as below
<div style="text-align: center; margin-top: 30px;">
<ons-input id="username" modifier="underbar" placeholder="Username" float></ons-input>
<ons-input id="password" modifier="underbar" type="password" placeholder="Password" float></ons-input>
<p style="margin-top: 30px;">
<ons-button onclick="login()">Sign in</ons-button>

  1. Access that page

Expected behavior

Page should render without error.

Actual behavior