Devise - Bootstrap - RoR: Sprockets::Rails::Helper::AssetNotFound in Devise::Sessions#new - ruby-on-rails

Question

I need your help today with a weird error that I get when trying to install Bootstrap with devise. I've been looking the web and SO but I can't seem to find a proper answer to my problem... If there is a solution out there (really searched promised!), then I'm sorry for the post. Here's the error message:
Showing /PATH/app/views/layouts/application.html.erb where line #14 raised:
The asset "apple-touch-icon-144x144-precomposed.png" is not present in the asset pipeline.
Extracted source (around line #14):
<!-- For third-generation iPad with high-resolution Retina display: -->
<!-- Size should be 144 x 144 pixels -->
<%= favicon_link_tag 'apple-touch-icon-144x144-precomposed.png', :rel => 'apple-touch-icon-precomposed', :type => 'image/png', :sizes => '144x144' %>
<!-- For iPhone with high-resolution Retina display: -->
<!-- Size should be 114 x 114 pixels -->
Rails.root: /PATH
All I until now in the project is creating it, adding Devise and then trying to install the gem 'twitter-bootstrap-rails' and apply the layouts but I get this error.
Here's a link to my github: https://github.com/Ardzii/finance-tracker
and here are the files that I edited particularly:
Gem file:
source 'https://rubygems.org'
git_source(:github) do |repo_name|
repo_name = "#{repo_name}/#{repo_name}" unless repo_name.include?("/")
"https://github.com/#{repo_name}.git"
end
# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '~> 5.1.1'
gem 'devise'
gem 'twitter-bootstrap-rails'
gem 'devise-bootstrap-views'
gem 'sprockets-rails', :require => 'sprockets/railtie'
gem 'jquery-rails'
# Use Puma as the app server
gem 'puma', '~> 3.7'
# Use SCSS for stylesheets
gem 'sass-rails', '~> 5.0'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# See https://github.com/rails/execjs#readme for more supported runtimes
# gem 'therubyracer', platforms: :ruby
# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails', '~> 4.2'
# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
gem 'turbolinks', '~> 5'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.5'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 3.0'
# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'
# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development
group :development, :test do
gem 'sqlite3'
# Call 'byebug' anywhere in the code to stop execution and get a debugger console
gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
# Adds support for Capybara system testing and selenium driver
gem 'capybara', '~> 2.13'
gem 'selenium-webdriver'
end
group :development do
# Access an IRB console on exception pages or by using <%= console %> anywhere in the code.
gem 'web-console', '>= 3.3.0'
gem 'listen', '>= 3.0.5', '< 3.2'
# Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
gem 'spring'
gem 'spring-watcher-listen', '~> 2.0.0'
end
# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
group :production do
gem 'pg'
gem 'rails_12factor'
end
application.css:
/*
* This is a manifest file that'll be compiled into application.css, which will include all the files
* listed below.
*
* Any CSS and SCSS file within this directory, lib/assets/stylesheets, or any plugin's
* vendor/assets/stylesheets directory can be referenced here using a relative path.
*
* You're free to add application-wide styles to this file and they'll appear at the bottom of the
* compiled file so the styles you add here take precedence over styles defined in any other CSS/SCSS
* files in this directory. Styles in this file should be added after the last require_* statement.
* It is generally better to create a new file per style scope.
*
*= require devise_bootstrap_views
*= require_tree .
*= require_self
*/
routes file:
Rails.application.routes.draw do
devise_for :users
# For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
root 'welcome#index'
end
And in the terminal I did:
$rails g bootstrap:install static
$rails g bootstrap:layout application
and overrode the application.html.erb
$rails g devise:views:locale en
$rails g devise:views:bootstrap_templates
***** EDIT: ADDING THE application.html.erb FILE (generated by Bootstrap) *******
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=Edge,chrome=1">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title><%= content_for?(:title) ? yield(:title) : "FinanceTracker" %></title>
<%= csrf_meta_tags %>
<%= stylesheet_link_tag "application", :media => "all" %>
<!-- For third-generation iPad with high-resolution Retina display: -->
<!-- Size should be 144 x 144 pixels -->
<%= favicon_link_tag 'apple-touch-icon-144x144-precomposed.png', :rel => 'apple-touch-icon-precomposed', :type => 'image/png', :sizes => '144x144' %>
<!-- For iPhone with high-resolution Retina display: -->
<!-- Size should be 114 x 114 pixels -->
<%= favicon_link_tag 'apple-touch-icon-114x114-precomposed.png', :rel => 'apple-touch-icon-precomposed', :type => 'image/png', :sizes => '114x114' %>
<!-- For first- and second-generation iPad: -->
<!-- Size should be 72 x 72 pixels -->
<%= favicon_link_tag 'apple-touch-icon-72x72-precomposed.png', :rel => 'apple-touch-icon-precomposed', :type => 'image/png', :sizes => '72x72' %>
<!-- For non-Retina iPhone, iPod Touch, and Android 2.1+ devices: -->
<!-- Size should be 57 x 57 pixels -->
<%= favicon_link_tag 'apple-touch-icon-precomposed.png', :rel => 'apple-touch-icon-precomposed', :type => 'image/png' %>
<!-- For all other devices -->
<!-- Size should be 32 x 32 pixels -->
<%= favicon_link_tag 'favicon.ico', :rel => 'shortcut icon' %>
<%= javascript_include_tag "application" %>
<!-- Le HTML5 shim, for IE6-8 support of HTML elements -->
<!--[if lt IE 9]>
<script src="//cdnjs.cloudflare.com/ajax/libs/html5shiv/3.7.2/html5shiv.min.js" type="text/javascript"></script>
<![endif]-->
</head>
<body>
<div class="navbar navbar-default navbar-static-top">
<div class="container">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-responsive-collapse">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">FinanceTracker</a>
<div class="navbar-collapse collapse navbar-responsive-collapse">
<ul class="nav navbar-nav">
<li><%= link_to "Link1", "/path1" %></li>
<li><%= link_to "Link2", "/path2" %></li>
<li><%= link_to "Link3", "/path3" %></li>
</ul>
</div>
</div>
</div>
<div class="container">
<div class="row">
<div class="col-lg-9">
<%= bootstrap_flash %>
<%= yield %>
</div>
<div class="col-lg-3">
<div class="well sidebar-nav">
<h3>Sidebar</h3>
<ul class="nav nav-list">
<li class="nav-header">Sidebar</li>
<li><%= link_to "Link1", "/path1" %></li>
<li><%= link_to "Link2", "/path2" %></li>
<li><%= link_to "Link3", "/path3" %></li>
</ul>
</div><!--/.well -->
</div><!--/span-->
</div><!--/row-->
<footer>
<p>© Company 2017</p>
</footer>
</div> <!-- /container -->
</body>
</html>
Thanks in advance!

Answer 1

This doesn't seem to be a Devise issue. It looks like the image apple-touch-icon-144x144-precomposed.png doesn't actually exist in your project. Rails is throwing you an error because it can't find it.
The apple-touch-icon-144x144-precomposed.png that rails cannot find is from the bootstrap theme. Those images should be in the folder of the theme that you downloaded (unless you somehow deleted the originals...then you would have to download it again). If you don't need those images anyway, you can just delete all of the favicon link tags from the <head> of your html layout and the error will go away.
-or-
You can use a favicon generator to create the ones you want and save them with those specific file names (in your case: apple-touch-icon-144x144-precomposed.png) into your project and the errors will go away as well. But once again, if you don't need them then there's no point in doing that.
Honestly, I'm not sure why you are encountering this issue if you didn't alter the original files from the theme, but you should read THIS & THIS to see if it helps clarify things.
Hope that helps & good luck with your project!