Pages deploy error with Jekyll

Hello, I am new to Pages and getting an error with my first deploy. I am building a Jekyll site from a private GitHub repo. I have a Gemfile, Gemfile.lock, and a simple page. But I am getting an error when deploying. It looks like jekyll is not installed or it is not running bundle. Any ideas?

2022-12-27T20:21:44.558758Z	Cloning repository...
2022-12-27T20:21:45.630473Z	From
2022-12-27T20:21:45.63105Z	 * branch            2aee4408653ab08f4194a6c8e3dac0795f174e6b -> FETCH_HEAD
2022-12-27T20:21:45.66286Z	HEAD is now at 2aee440 Initial commit
2022-12-27T20:21:45.825771Z	Success: Finished cloning repository files
2022-12-27T20:21:46.686989Z	Installing dependencies
2022-12-27T20:21:46.697263Z	Python version set to 2.7
2022-12-27T20:21:49.878558Z	v12.18.0 is already installed.
2022-12-27T20:21:51.011966Z	Now using node v12.18.0 (npm v6.14.4)
2022-12-27T20:21:51.217997Z	Started restoring cached build plugins
2022-12-27T20:21:51.232363Z	Finished restoring cached build plugins
2022-12-27T20:21:51.687437Z	Attempting ruby version 2.7.1, read from environment
2022-12-27T20:21:55.08851Z	Using ruby version 2.7.1
2022-12-27T20:21:55.434398Z	Using PHP version 5.6
2022-12-27T20:21:55.585227Z	5.2 is already installed.
2022-12-27T20:21:55.610283Z	Using Swift version 5.2
2022-12-27T20:21:55.610894Z	Installing Hugo 0.54.0
2022-12-27T20:21:56.278829Z	Hugo Static Site Generator v0.54.0-B1A82C61A/extended linux/amd64 BuildDate: 2019-02-01T10:04:38Z
2022-12-27T20:21:56.28241Z	Started restoring cached go cache
2022-12-27T20:21:56.29904Z	Finished restoring cached go cache
2022-12-27T20:21:56.428492Z	go version go1.14.4 linux/amd64
2022-12-27T20:21:56.443297Z	go version go1.14.4 linux/amd64
2022-12-27T20:21:56.446573Z	Installing missing commands
2022-12-27T20:21:56.446838Z	Verify run directory
2022-12-27T20:21:56.447008Z	Executing user command: jekyll build
2022-12-27T20:21:56.45152Z	/opt/build/bin/build: line 39: jekyll: command not found
2022-12-27T20:21:56.456451Z	Failed: build command exited with code: 127
2022-12-27T20:21:57.268313Z	Failed: an internal error occurred

Did you run gem install jekyll? Considering it couldn’t find it, it seems like it isn’t in your Gemfile

Thanks @Walshy. This is on the Cloudflare build server; I don’t think I have a way to run gem at the command line.

Here is the build configuration:

And here is my Gemfile:

source ""
# Hello! This is where you manage which Jekyll version is used to run.
# When you want to use a different version, change it below, save the
# file and run `bundle install`. Run Jekyll with `bundle exec`, like so:
#     bundle exec jekyll serve
# This will help ensure the proper Jekyll version is running.
# Happy Jekylling!
gem "jekyll", "~> 4.3.1"
# This is the default theme for new Jekyll sites. You may change this to anything you like.
gem "minima", "~> 2.5"
# If you want to use GitHub Pages, remove the "gem "jekyll"" above and
# uncomment the line below. To upgrade, run `bundle update github-pages`.
# gem "github-pages", group: :jekyll_plugins
# If you have any plugins, put them here!
group :jekyll_plugins do
  gem "jekyll-feed", "~> 0.12"

# Windows and JRuby does not include zoneinfo files, so bundle the tzinfo-data gem
# and associated library.
platforms :mingw, :x64_mingw, :mswin, :jruby do
  gem "tzinfo", ">= 1", "< 3"
  gem "tzinfo-data"

# Performance-booster for watching directories on Windows
gem "wdm", "~> 0.1.1", :platforms => [:mingw, :x64_mingw, :mswin]

# Lock `http_parser.rb` gem to `v0.6.x` on JRuby builds since newer versions of the gem
# do not have a Java counterpart.
gem "http_parser.rb", "~> 0.6.0", :platforms => [:jruby]

## tjg
## from
gem "jekyll-sass-converter", "~> 2.0"