Heroku Error when pushing Ruby via Github - ruby

Question

A friend of mine programmed me a website years ago. Unfortunately from one day to the next the website did not work anymore.
I do not have Ruby on my computer (I never had it before either).
I am currently trying to host the Website again on Heroku via Github (https://github.com/dtricc/zoquant) and I get the following error:
See here
My Gemfile looks as follows:
source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }
ruby '3.2.0'
gem 'rails', '~> 7.0.3'
gem 'pg', '>= 0.18', '< 2.0'
gem 'puma', '~> 6.0.2'
gem 'sass-rails', '~> 5.0'
gem 'uglifier', '>= 1.3.0'
gem 'webpacker'
gem 'coffee-rails', '~> 4.2'
gem 'turbolinks', '~> 5'
gem 'jbuilder', '~> 2.5'
gem 'bootsnap', '>= 1.1.0', require: false
gem 'autoprefixer-rails'
gem 'font-awesome-sass', '~> 5.6.1'
gem 'simple_form'
group :development, :test do
gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
end
group :development do
gem 'web-console', '>= 3.3.0'
gem 'listen', '>= 3.0.5', '< 3.2'
gem 'spring'
gem 'spring-watcher-listen', '~> 2.0.0'
end
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
My Gemfile.lock looks as follows:
GEM
remote: https://rubygems.org/
specs:
actioncable (5.2.2)
actionpack (= 5.2.2)
nio4r (~> 2.0)
websocket-driver (>= 0.6.1)
actionmailbox (7.0.3)
actionpack (= 7.0.3)
activejob (= 7.0.3)
activerecord (= 7.0.3)
activestorage (= 7.0.3)
activesupport (= 7.0.3)
mail (>= 2.7.1)
net-imap (>= 0)
net-pop (>= 0)
net-smtp (>= 0)
actiontext (7.0.3)
actionpack (= 7.0.3)
activerecord (= 7.0.3)
activestorage (= 7.0.3)
activesupport (= 7.0.3)
globalid (>= 0.6.0)
nokogiri (>= 1.8.5)
actionmailer (5.2.2)
actionpack (= 5.2.2)
actionview (= 5.2.2)
activejob (= 5.2.2)
mail (~> 2.5, >= 2.5.4)
rails-dom-testing (~> 2.0)
actionpack (7.0.3)
actionview (= 7.0.3)
activesupport (= 7.0.3)
rack (~> 2.0, >= 2.2.0)
rack-test (>= 0.6.3)
rails-dom-testing (~> 2.0)
rails-html-sanitizer (~> 1.0, >= 1.2.0)
actionview (5.2.2)
activesupport (= 5.2.2)
builder (~> 3.1)
erubi (~> 1.4)
rails-dom-testing (~> 2.0)
rails-html-sanitizer (~> 1.0, >= 1.0.3)
activejob (5.2.2)
activesupport (= 5.2.2)
globalid (>= 0.3.6)
activemodel (7.0.3)
activesupport (= 7.0.3)
activerecord (7.0.3)
activemodel (= 7.0.3)
activesupport (= 7.0.3)
activestorage (7.0.3)
actionpack (= 7.0.3)
activejob (= 7.0.3)
activerecord (= 7.0.3)
activesupport (= 7.0.3)
marcel (~> 1.0)
mini_mime (>= 1.1.0)
activesupport (7.0.3)
concurrent-ruby (~> 1.0, >= 1.0.2)
i18n (>= 1.6, < 2)
minitest (>= 5.1)
tzinfo (~> 2.0)
arel (9.0.0)
autoprefixer-rails (9.4.10.2)
execjs
bindex (0.5.0)
bootsnap (1.4.1)
msgpack (~> 1.0)
builder (3.2.3)
byebug (11.0.0)
coffee-rails (4.2.2)
coffee-script (>= 2.2.0)
railties (>= 4.0.0)
coffee-script (2.4.1)
coffee-script-source
execjs
coffee-script-source (1.12.2)
concurrent-ruby (1.1.5)
crass (1.0.4)
erubi (1.8.0)
execjs (2.7.0)
ffi (1.10.0)
font-awesome-sass (5.6.1)
sassc (>= 1.11)
globalid (0.4.2)
activesupport (>= 4.2.0)
i18n (1.6.0)
concurrent-ruby (~> 1.0)
jbuilder (2.8.0)
activesupport (>= 4.2.0)
multi_json (>= 1.2)
listen (3.1.5)
rb-fsevent (~> 0.9, >= 0.9.4)
rb-inotify (~> 0.9, >= 0.9.7)
ruby_dep (~> 1.2)
loofah (2.2.3)
crass (~> 1.0.2)
nokogiri (>= 1.5.9)
mail (2.7.1)
mini_mime (>= 0.1.1)
marcel (1.0.2)
mimemagic (>= 0.3.2)
method_source (0.9.2)
mimemagic (0.4.2)
nokogiri (~> 1)
rake (>= 0)
mini_mime (1.0.1)
mini_portile2 (2.4.0)
minitest (5.11.3)
msgpack (1.2.9)
multi_json (1.13.1)
nio4r (2.3.1)
nokogiri (1.10.1)
mini_portile2 (~> 2.4.0)
pg (1.1.4)
puma (3.12.0)
rack (2.0.6)
rack-proxy (0.6.5)
rack
rack-test (1.1.0)
rack (>= 1.0, < 3)
rails (7.0.3)
actioncable (= 7.0.3)
actionmailbox (= 7.0.3)
actionmailer (= 7.0.3)
actionpack (= 7.0.3)
actiontext (= 7.0.3)
actionview (= 7.0.3)
activejob (= 7.0.3)
activemodel (= 7.0.3)
activerecord (= 7.0.3)
activestorage (= 7.0.3)
activesupport (= 7.0.3)
bundler (>= 1.15.0)
railties (= 7.0.3)
sprockets-rails (>= 2.0.0)
rails-dom-testing (2.0.3)
activesupport (>= 4.2.0)
nokogiri (>= 1.6)
rails-html-sanitizer (1.0.4)
loofah (~> 2.2, >= 2.2.2)
railties (5.2.2)
actionpack (= 5.2.2)
activesupport (= 5.2.2)
method_source
rake (>= 0.8.7)
thor (>= 0.19.0, < 2.0)
rake (12.3.2)
rb-fsevent (0.10.3)
rb-inotify (0.10.0)
ffi (~> 1.0)
ruby_dep (1.5.0)
sass (3.7.3)
sass-listen (~> 4.0.0)
sass-listen (4.0.0)
rb-fsevent (~> 0.9, >= 0.9.4)
rb-inotify (~> 0.9, >= 0.9.7)
sass-rails (5.0.7)
railties (>= 4.0.0, < 6)
sass (~> 3.1)
sprockets (>= 2.8, < 4.0)
sprockets-rails (>= 2.0, < 4.0)
tilt (>= 1.1, < 3)
sassc (2.2.1)
ffi (~> 1.9)
rake
simple_form (4.1.0)
actionpack (>= 5.0)
activemodel (>= 5.0)
spring (2.0.2)
activesupport (>= 4.2)
spring-watcher-listen (2.0.1)
listen (>= 2.7, < 4.0)
spring (>= 1.2, < 3.0)
sprockets (3.7.2)
concurrent-ruby (~> 1.0)
rack (> 1, < 3)
sprockets-rails (3.2.1)
actionpack (>= 4.0)
activesupport (>= 4.0)
sprockets (>= 3.0.0)
thor (0.20.3)
thread_safe (0.3.6)
tilt (2.0.9)
turbolinks (5.2.0)
turbolinks-source (~> 5.2)
turbolinks-source (5.2.0)
tzinfo (1.2.5)
thread_safe (~> 0.1)
uglifier (4.1.20)
execjs (>= 0.3.0, < 3)
web-console (3.7.0)
actionview (>= 5.0)
activemodel (>= 5.0)
bindex (>= 0.4.0)
railties (>= 5.0)
webpacker (4.0.2)
activesupport (>= 4.2)
rack-proxy (>= 0.6.1)
railties (>= 4.2)
websocket-driver (0.7.0)
websocket-extensions (>= 0.1.0)
websocket-extensions (0.1.3)
PLATFORMS
ruby
x86_64-linux
DEPENDENCIES
autoprefixer-rails
bootsnap (>= 1.1.0)
byebug
coffee-rails (~> 4.2)
font-awesome-sass (~> 5.6.1)
jbuilder (~> 2.5)
listen (>= 3.0.5, < 3.2)
pg (>= 0.18, < 2.0)
puma (~> 3.11)
rails (~> 5.2.2)
sass-rails (~> 5.0)
simple_form
spring
spring-watcher-listen (~> 2.0.0)
turbolinks (~> 5)
tzinfo-data
uglifier (>= 1.3.0)
web-console (>= 3.3.0)
webpacker
RUBY VERSION
ruby (~> 3.2.0)
I would appreciate any help!
Best Lorenzo
I already changed the versions of some of the packages (I obtained the error that the packages are to old and not supported by Heroku.

Answer 1

Looking into your commit history in your GitHub account, it feels like you tried to update the Ruby from 2.5.3 to 3.2.0 and the Ruby on Rails version from 5.2.2 to 7.0.3 in your project without doing any code changes.
Ruby 3.0 introduced some syntax changes. And upgrading two major versions of Ruby on Rails without having to change anything in the application, is usually not possible.
I advise reverting those changes and to restart the upgrade. But this time, only update in small incremental steps, following the suggestions from the official Rails Guides about upgrading.
Additionally, each Rails version supports or has preferred Ruby versions to run with. I suggest following the update path for Ruby and Ruby on Rails from this answer.