500 Internal Server Error

cannot load such file -- bundler/setup (LoadError)

<internal:/usr/local/lib/ruby/site_ruby/3.2/rubygems/core_ext/kernel_require.rb>:136:in `require'
<internal:/usr/local/lib/ruby/site_ruby/3.2/rubygems/core_ext/kernel_require.rb>:136:in `require'
/home/www/data/hiroyuki/diary/lib/tdiary/environment.rb:8:in `<top (required)>'
<internal:/usr/local/lib/ruby/site_ruby/3.2/rubygems/core_ext/kernel_require.rb>:136:in `require'
<internal:/usr/local/lib/ruby/site_ruby/3.2/rubygems/core_ext/kernel_require.rb>:136:in `require'
/home/www/data/hiroyuki/diary/lib/tdiary.rb:25:in `<top (required)>'
<internal:/usr/local/lib/ruby/site_ruby/3.2/rubygems/core_ext/kernel_require.rb>:136:in `require'
<internal:/usr/local/lib/ruby/site_ruby/3.2/rubygems/core_ext/kernel_require.rb>:136:in `require'
/home/www/data/hiroyuki/diary/index.rb:19:in `<main>'