500 Internal Server Error

undefined local variable or method `cache_path' for #<TDiary::EstraierRegister:0x00000001f3eae8> (NameError)

(plugin/estraier-register.rb):112:in `initialize'
(plugin/estraier-register.rb):270:in `new'
(plugin/estraier-register.rb):270:in `block (3 levels) in load_plugin'
(plugin/estraier-register.rb):91:in `transaction'
(plugin/estraier-register.rb):269:in `block (2 levels) in load_plugin'
/home/yamada/public_html/tdiary/tdiary/plugin.rb:135:in `call'
/home/yamada/public_html/tdiary/tdiary/plugin.rb:135:in `block in update_proc'
/home/yamada/public_html/tdiary/tdiary/plugin.rb:134:in `each'
/home/yamada/public_html/tdiary/tdiary/plugin.rb:134:in `update_proc'
/home/yamada/public_html/tdiary/tdiary.rb:509:in `block in do_eval_rhtml'
/home/yamada/public_html/tdiary/tdiary.rb:509:in `instance_eval'
/home/yamada/public_html/tdiary/tdiary.rb:509:in `do_eval_rhtml'
/home/yamada/public_html/tdiary/tdiary.rb:162:in `eval_rhtml'
/home/yamada/public_html/tdiary/tdiary/dispatcher/update_main.rb:31:in `run'
/home/yamada/public_html/tdiary/tdiary/dispatcher/update_main.rb:6:in `run'
/home/yamada/public_html/tdiary/tdiary/dispatcher.rb:21:in `dispatch_cgi'
update.rb:36:in `<main>'