500 Internal Server Error

mon out of range (ArgumentError)

/usr/share/tdiary/lib/tdiary/view.rb:329:in `local'
/usr/share/tdiary/lib/tdiary/view.rb:329:in `initialize'
/usr/share/tdiary/lib/tdiary/dispatcher/index_main.rb:103:in `new'
/usr/share/tdiary/lib/tdiary/dispatcher/index_main.rb:103:in `create_tdiary'
/usr/share/tdiary/lib/tdiary/dispatcher/index_main.rb:20:in `run'
/usr/share/tdiary/lib/tdiary/dispatcher/index_main.rb:5:in `run'
/usr/share/tdiary/lib/tdiary/dispatcher.rb:25:in `dispatch_cgi'
/usr/share/tdiary/index.rb:32:in `<top (required)>'
/usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
/usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
index.rb:2:in `<main>'