I am getting an error attempting to deploy my rails application using capistrano/nginx and passenger, capistrano is working fine and I can run my deploy command just fine however I cannot access my endpoint due to an error coming from passenger gem.

This is the error logged in the temp html file passenger creates when attempting to visit my domiain.

`Error response
Error code: 404

Message: File not found.

Error code explanation: HTTPStatus.NOT_FOUND – Nothing matches the given URI.`

and this is what it says when you view the page.

We're sorry, but something went wrong. The issue has been logged for investigation. Please try again later.

this is what nginx error log shows

App 79721 output:   from /home/deploy/.rbenv/versions/2.6.1/lib/ruby/gems/2.6.0/gems/bundler-2.4.22/lib/bundler.rb:208:in `definition'
App 79721 output:   from /home/deploy/.rbenv/versions/2.6.1/lib/ruby/gems/2.6.0/gems/bundler-2.4.22/lib/bundler.rb:156:in `setup'
App 79721 output:   from /home/deploy/.rbenv/versions/2.6.1/lib/ruby/2.6.0/bundler/setup.rb:20:in `<top (required)>'
App 79721 output:   from /home/deploy/.rbenv/versions/2.6.1/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
App 79721 output:   from /home/deploy/.rbenv/versions/2.6.1/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
[ E 2024-06-30 12:40:49.9999 77711/T2g age/Cor/App/Implementation.cpp:221 ]: Could not spawn process for application /home/deploy/myappname/current: The application process exited prematurely.
  Error ID: bbc2b04f
  Error details saved to: /tmp/passenger-error-v7N1qC.html

[ E 2024-06-30 12:40:50.0044 77711/T6 age/Cor/Con/CheckoutSession.cpp:281 ]: [Client 1-16] Cannot checkout session because a spawning error occurred. The identifier of the error is bbc2b04f. Please see earlier logs for details about the error.

This is what my gemfile looks like (this is an older ruby app that i plan to upgrade once i get deploy setup)

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', '~> 5.0.7', '>= 5.0.7.2'
# Use postgresql as the database for Active Record
gem 'pg', '>= 0.18', '< 2.0'
# Use Puma as the app server
gem 'puma', '~> 3.0'
# 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

# Use Rack CORS for handling Cross-Origin Resource Sharing (CORS), making cross-origin AJAX possible
gem 'rack-cors'

gem 'jwt'

gem 'capistrano', '~> 3.11'
gem 'capistrano-rails', '~> 1.4'
gem 'capistrano-passenger', '~> 0.2.0'
gem 'capistrano-rbenv', '~> 2.1', '>= 2.1.4'

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug', platform: :mri
  gem 'pry-byebug'
end

group :development do
  gem 'listen', '~> 3.0.5'
  # 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]

and this is what my nginx config looks like

server {
  listen 80;
  listen [::]:80;

  server_name mydomain.app;
  root /home/deploy/myappname/current/public;

  passenger_enabled on;
  passenger_app_env production;
  passenger_preload_bundler on;

  location /cable {
    passenger_app_group_name mydomain_websocket;
    passenger_force_max_concurrent_requests_per_process 0;
  }

  # Allow uploads up to 100MB in size
  client_max_body_size 100m;

  location ~ ^/(assets|packs) {
    expires max;
    gzip_static on;
  }

  # Return 404 for requests to any unknown routes
  error_page 404 /404.html;
  location = /404.html {
    internal;
  }

  # Additional error handling
  error_page 500 502 503 504 /50x.html;
  location = /50x.html {
    internal;
  }
}

I am following this tutorial which I’ve followed with other projects without these issues running on the same hosting DigitalOcean VPS ubuntu 22.04 LTS

https://gorails.com/deploy/ubuntu/22.04

Searching passenger project github
Stackoverflow search
Google Search
ChatGPT troubleshooting

Was going to open a issue ticket with passenger but it says to try stackoverflow first.