Rake annotate: can't find executable annotate for gem annotate

When running rake annotate I get the following error:

# rake annotate --trace
** Invoke annotate (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute annotate
/usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.5.3/lib/bundler/rubygems_integration.rb:265:in `block in replace_bin_path': can't find executable annotate for gem annotate. annotate is not currently included in the bundle, perhaps you meant to add it to your Gemfile? (Gem::Exception)
        from /usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.5.3/lib/bundler/rubygems_integration.rb:304:in `block in replace_bin_path'
        from bin/annotate:29:in `<main>'
rake aborted!
Command failed with exit 1: bin/annotate
/var/www/discourse/lib/tasks/annotate.rake:5:in `system'
/var/www/discourse/lib/tasks/annotate.rake:5:in `block in <main>'
/var/www/discourse/vendor/bundle/ruby/3.2.0/gems/rake-13.2.1/lib/rake/task.rb:281:in `block in execute'
/var/www/discourse/vendor/bundle/ruby/3.2.0/gems/rake-13.2.1/lib/rake/task.rb:281:in `each'
/var/www/discourse/vendor/bundle/ruby/3.2.0/gems/rake-13.2.1/lib/rake/task.rb:281:in `execute'
/var/www/discourse/vendor/bundle/ruby/3.2.0/gems/rake-13.2.1/lib/rake/task.rb:219:in `block in invoke_with_call_chain'
/var/www/discourse/vendor/bundle/ruby/3.2.0/gems/rake-13.2.1/lib/rake/task.rb:199:in `synchronize'
/var/www/discourse/vendor/bundle/ruby/3.2.0/gems/rake-13.2.1/lib/rake/task.rb:199:in `invoke_with_call_chain'
/var/www/discourse/vendor/bundle/ruby/3.2.0/gems/rake-13.2.1/lib/rake/task.rb:188:in `invoke'
/var/www/discourse/vendor/bundle/ruby/3.2.0/gems/rake-13.2.1/lib/rake/application.rb:188:in `invoke_task'
/var/www/discourse/vendor/bundle/ruby/3.2.0/gems/rake-13.2.1/lib/rake/application.rb:138:in `block (2 levels) in top_level'
/var/www/discourse/vendor/bundle/ruby/3.2.0/gems/rake-13.2.1/lib/rake/application.rb:138:in `each'
/var/www/discourse/vendor/bundle/ruby/3.2.0/gems/rake-13.2.1/lib/rake/application.rb:138:in `block in top_level'
/var/www/discourse/vendor/bundle/ruby/3.2.0/gems/rake-13.2.1/lib/rake/application.rb:147:in `run_with_threads'
/var/www/discourse/vendor/bundle/ruby/3.2.0/gems/rake-13.2.1/lib/rake/application.rb:132:in `top_level'
/var/www/discourse/vendor/bundle/ruby/3.2.0/gems/rake-13.2.1/lib/rake/application.rb:83:in `block in run'
/var/www/discourse/vendor/bundle/ruby/3.2.0/gems/rake-13.2.1/lib/rake/application.rb:214:in `standard_exception_handling'
/var/www/discourse/vendor/bundle/ruby/3.2.0/gems/rake-13.2.1/lib/rake/application.rb:80:in `run'
bin/rake:13:in `<top (required)>'
/usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.5.3/lib/bundler/cli/exec.rb:58:in `load'
/usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.5.3/lib/bundler/cli/exec.rb:58:in `kernel_load'
/usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.5.3/lib/bundler/cli/exec.rb:23:in `run'
/usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.5.3/lib/bundler/cli.rb:451:in `exec'
/usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.5.3/lib/bundler/vendor/thor/lib/thor/command.rb:28:in `run'
/usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.5.3/lib/bundler/vendor/thor/lib/thor/invocation.rb:127:in `invoke_command'
/usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.5.3/lib/bundler/vendor/thor/lib/thor.rb:527:in `dispatch'
/usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.5.3/lib/bundler/cli.rb:34:in `dispatch'
/usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.5.3/lib/bundler/vendor/thor/lib/thor/base.rb:584:in `start'
/usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.5.3/lib/bundler/cli.rb:28:in `start'
/usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.5.3/exe/bundle:28:in `block in <top (required)>'
/usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.5.3/lib/bundler/friendly_errors.rb:117:in `with_friendly_errors'
/usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.5.3/exe/bundle:20:in `<top (required)>'
/usr/local/bin/bundle:25:in `load'
/usr/local/bin/bundle:25:in `<main>'
Tasks: TOP => annotate

Can anyone help to explain what is wrong? Thanks.