Plugin Error

Errors in plugins? Retry to Update or Configure.

ArgumentError
invalid byte sequence in UTF-8
/usr/local/ruby-2.0/lib/ruby/2.0.0/cgi/util.rb:36:in `gsub'
/usr/local/ruby-2.0/lib/ruby/2.0.0/cgi/util.rb:36:in `escapeHTML'
/usr/local/ruby-2.0/lib/ruby/2.0.0/erb.rb:932:in `html_escape'
(plugin/category.rb):130:in `block (3 levels) in category_list_sections'
(plugin/category.rb):129:in `each'
(plugin/category.rb):129:in `block (2 levels) in category_list_sections'
(plugin/category.rb):127:in `each'
(plugin/category.rb):127:in `block in category_list_sections'
(plugin/category.rb):114:in `each'
(plugin/category.rb):114:in `category_list_sections'
(TDiary::Plugin#eval_src):21:in `block in eval_src'
/home/tdiary/tdiary/tdiary-core/tdiary/plugin.rb:99:in `eval'
/home/tdiary/tdiary/tdiary-core/tdiary/plugin.rb:99:in `block in eval_src'
/home/tdiary/tdiary/tdiary-core/tdiary/core_ext.rb:106:in `block in safe'
/home/tdiary/tdiary/tdiary-core/tdiary/core_ext.rb:107:in `call'
/home/tdiary/tdiary/tdiary-core/tdiary/core_ext.rb:107:in `safe'
/home/tdiary/tdiary/tdiary-core/tdiary/plugin.rb:98:in `eval_src'
/home/tdiary/tdiary/tdiary-core/tdiary/base.rb:63:in `do_eval_rhtml'
/home/tdiary/tdiary/tdiary-core/tdiary/base.rb:30:in `eval_rhtml'
/home/tdiary/tdiary/tdiary-core/tdiary/dispatcher/index_main.rb:43:in `run'
/home/tdiary/tdiary/tdiary-core/tdiary/dispatcher/index_main.rb:6:in `run'
/home/tdiary/tdiary/tdiary-core/tdiary/dispatcher.rb:21:in `dispatch_cgi'
/home/tdiary/users/kantan/index.rb:36:in `<main>'