Plugin Error

Errors in plugins? Retry to Update or Configure.

Encoding::ConverterNotFoundError
code converter not found (UTF-8 to euc)
(plugin/a.rb):98:in `encode'
(plugin/a.rb):98:in `a_convert_charset'
(plugin/a.rb):140:in `a'
(TDiary::Plugin#eval_src):127:in `block in eval_src'
/virtual/yotabanana/gem/gems/tdiary-4.1.1/lib/tdiary/plugin.rb:106:in `eval'
/virtual/yotabanana/gem/gems/tdiary-4.1.1/lib/tdiary/plugin.rb:106:in `block in eval_src'
/virtual/yotabanana/gem/gems/tdiary-4.1.1/lib/tdiary/core_ext.rb:121:in `block in safe'
/virtual/yotabanana/gem/gems/tdiary-4.1.1/lib/tdiary/core_ext.rb:123:in `call'
/virtual/yotabanana/gem/gems/tdiary-4.1.1/lib/tdiary/core_ext.rb:123:in `safe'
/virtual/yotabanana/gem/gems/tdiary-4.1.1/lib/tdiary/plugin.rb:105:in `eval_src'
/virtual/yotabanana/gem/gems/tdiary-4.1.1/lib/tdiary/base.rb:66:in `do_eval_rhtml'
/virtual/yotabanana/gem/gems/tdiary-4.1.1/lib/tdiary/base.rb:30:in `eval_rhtml'
/virtual/yotabanana/gem/gems/tdiary-4.1.1/lib/tdiary/view.rb:247:in `eval_rhtml'
/virtual/yotabanana/gem/gems/tdiary-4.1.1/lib/tdiary/dispatcher/index_main.rb:43:in `run'
/virtual/yotabanana/gem/gems/tdiary-4.1.1/lib/tdiary/dispatcher/index_main.rb:6:in `run'
/virtual/yotabanana/gem/gems/tdiary-4.1.1/lib/tdiary/dispatcher.rb:26:in `dispatch_cgi'
/virtual/yotabanana/gem/gems/tdiary-4.1.1/index.rb:32:in `<top (required)>'
/usr/local/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
/usr/local/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
index.rb:4:in `<main>'