Hiki Error

invalid byte sequence in UTF-8 (ArgumentError)
/virtual/qteamer/public_html/wiki.qteamer-soft.com/hiki/command.rb:65:in `initialize'
hiki.cgi:35:in `new'
hiki.cgi:35:in `block in <main>'
/virtual/qteamer/public_html/wiki.qteamer-soft.com/hiki/storage.rb:13:in `open_db'
hiki.cgi:34:in `<main>'