Plugin Error

Errors in plugins? Retry to Update or Configure.

ArgumentError
invalid byte sequence in UTF-8
/usr/local/rvm/rubies/ruby-2.2.5/lib/ruby/2.2.0/cgi/util.rb:37:in `gsub'
/usr/local/rvm/rubies/ruby-2.2.5/lib/ruby/2.2.0/cgi/util.rb:37:in `escapeHTML'
/usr/local/rvm/rubies/ruby-2.2.5/lib/ruby/2.2.0/erb.rb:946:in `html_escape'
(plugin/src.rb):12:in `src'
(TDiary::Plugin#eval_src):366:in `block in eval_src'
/virtual/ogawa/public_html/tdiary/lib/tdiary/plugin.rb:107:in `eval'
/virtual/ogawa/public_html/tdiary/lib/tdiary/plugin.rb:107:in `block in eval_src'
/virtual/ogawa/public_html/tdiary/lib/tdiary/core_ext.rb:121:in `block in safe'
/virtual/ogawa/public_html/tdiary/lib/tdiary/core_ext.rb:123:in `call'
/virtual/ogawa/public_html/tdiary/lib/tdiary/core_ext.rb:123:in `safe'
/virtual/ogawa/public_html/tdiary/lib/tdiary/plugin.rb:106:in `eval_src'
/virtual/ogawa/public_html/tdiary/lib/tdiary/base.rb:66:in `do_eval_rhtml'
/virtual/ogawa/public_html/tdiary/lib/tdiary/base.rb:30:in `eval_rhtml'
/virtual/ogawa/public_html/tdiary/lib/tdiary/view.rb:247:in `eval_rhtml'
/virtual/ogawa/public_html/tdiary/lib/tdiary/dispatcher/index_main.rb:43:in `run'
/virtual/ogawa/public_html/tdiary/lib/tdiary/dispatcher/index_main.rb:6:in `run'
/virtual/ogawa/public_html/tdiary/lib/tdiary/dispatcher.rb:26:in `dispatch_cgi'
index.cgi:32:in `<main>'