overcommitを導入してコミットを成功させる

前提・実現したいこと

GithubDesktopでのコミットを成功させたいです。

railsでアプリを開発しています。
.gitignoreを編集しGithubDesktopでコミットをしようとしたら以下のエラーが発生しました。
LinterとしてRuboCopとovercommitを導入したのですが、今回のエラーとしてそれらが関係していると思われます。
編集内容としては画像ファイルがコミットされないようにpublic/uploads/*と記載しました。

発生している問題・エラーメッセージ

Commit failed - exit code 1 received, with output: 'Running pre-commit hooks

✓ All pre-commit hooks passed

Running commit-msg hooks
Check subject line................................[SingleLineSubject] OK
Check for trailing periods in subject................[TrailingPeriod] OK
Check text width..........................................[TextWidth] FAILED
Hook raised unexpected error
invalid byte sequence in US-ASCII
/Users/iwanabekiyoshiya/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/overcommit-0.57.0/lib/overcommit/hook/commit_msg/text_width.rb:53:in `match'
/Users/iwanabekiyoshiya/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/overcommit-0.57.0/lib/overcommit/hook/commit_msg/text_width.rb:53:in `match'
/Users/iwanabekiyoshiya/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/overcommit-0.57.0/lib/overcommit/hook/commit_msg/text_width.rb:53:in `special_prefix_length'
/Users/iwanabekiyoshiya/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/overcommit-0.57.0/lib/overcommit/hook/commit_msg/text_width.rb:25:in `find_errors_in_subject'
/Users/iwanabekiyoshiya/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/overcommit-0.57.0/lib/overcommit/hook/commit_msg/text_width.rb:12:in `run'
/Users/iwanabekiyoshiya/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/overcommit-0.57.0/lib/overcommit/hook/base.rb:47:in `block in run_and_transform'
/Users/iwanabekiyoshiya/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/overcommit-0.57.0/lib/overcommit/utils.rb:260:in `with_environment'
/Users/iwanabekiyoshiya/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/overcommit-0.57.0/lib/overcommit/hook/base.rb:47:in `run_and_transform'
/Users/iwanabekiyoshiya/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/overcommit-0.57.0/lib/overcommit/hook_runner.rb:161:in `run_hook'
/Users/iwanabekiyoshiya/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/overcommit-0.57.0/lib/overcommit/hook_runner.rb:97:in `block in consume'
/Users/iwanabekiyoshiya/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/overcommit-0.57.0/lib/overcommit/hook_runner.rb:94:in `loop'
/Users/iwanabekiyoshiya/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/overcommit-0.57.0/lib/overcommit/hook_runner.rb:94:in `consume'
Check subject capitalization.....................[CapitalizedSubject] FAILED
Hook raised unexpected error
invalid byte sequence in US-ASCII
/Users/iwanabekiyoshiya/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/overcommit-0.57.0/lib/overcommit/hook/commit_msg/capitalized_subject.rb:11:in `match'
/Users/iwanabekiyoshiya/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/overcommit-0.57.0/lib/overcommit/hook/commit_msg/capitalized_subject.rb:11:in `match'
/Users/iwanabekiyoshiya/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/overcommit-0.57.0/lib/overcommit/hook/commit_msg/capitalized_subject.rb:11:in `run'
/Users/iwanabekiyoshiya/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/overcommit-0.57.0/lib/overcommit/hook/base.rb:47:in `block in run_and_transform'
/Users/iwanabekiyoshiya/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/overcommit-0.57.0/lib/overcommit/utils.rb:260:in `with_environment'
/Users/iwanabekiyoshiya/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/overcommit-0.57.0/lib/overcommit/hook/base.rb:47:in `run_and_transform'
/Users/iwanabekiyoshiya/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/overcommit-0.57.0/lib/overcommit/hook_runner.rb:161:in `run_hook'
/Users/iwanabekiyoshiya/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/overcommit-0.57.0/lib/overcommit/hook_runner.rb:97:in `block in consume'
/Users/iwanabekiyoshiya/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/overcommit-0.57.0/lib/overcommit/hook_runner.rb:94:in `loop'
/Users/iwanabekiyoshiya/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/overcommit-0.57.0/lib/overcommit/hook_runner.rb:94:in `consume'

✗ One or more commit-msg hooks failed


Failed commit message:
画像ファイルについて

画像ファイルがコミットされないようにpublic/uploadsディレクトリを.gitignoreに追加

Try again with your existing commit message by running:
git commit --edit --file=.git/COMMIT_EDITMSG'

該当のソースコード

《.gitignore》


# See https://help.github.com/articles/ignoring-files for more about ignoring files.
#
# If you find yourself ignoring temporary files generated by your text editor
# or operating system, you probably want to add a global ignore instead:
#   git config --global core.excludesfile '~/.gitignore_global'

# Ignore bundler config.
/.bundle

# Ignore all logfiles and tempfiles.
/log/*
/tmp/*
!/log/.keep
!/tmp/.keep

# Ignore uploaded files in development.
/storage/*
!/storage/.keep

/public/assets
.byebug_history

# Ignore master key for decrypting credentials and more.
/config/master.key

/public/packs
/public/packs-test
/node_modules
/yarn-error.log
yarn-debug.log*
.yarn-integrity
public/uploads/*