500 Internal Server Error

uninitialized constant Rackup (NameError)

/usr/share/tdiary/index.rb:35:in `<top (required)>'
/usr/share/tdiary/index.fcgi:30:in `load'
/usr/share/tdiary/index.fcgi:30:in `block (2 levels) in <top (required)>'
/usr/share/tdiary/index.fcgi:29:in `chdir'
/usr/share/tdiary/index.fcgi:29:in `block in <top (required)>'
/usr/share/tdiary/misc/lib/fcgi_patch.rb:73:in `block in each_cgi'
/usr/share/tdiary/misc/lib/fcgi_patch.rb:70:in `each'
/usr/share/tdiary/misc/lib/fcgi_patch.rb:70:in `each_cgi'
/usr/share/tdiary/index.fcgi:21:in `<top (required)>'
index.fcgi:9:in `load'
index.fcgi:9:in `<main>'