Accept-Charset encoding error (CGI::InvalidEncoding)

/home/baku/.rbenv/versions/3.4.1/lib/ruby/3.4.0/cgi/core.rb:693:in 'block (2 levels) in CGI::QueryExtension#initialize_query'
/home/baku/.rbenv/versions/3.4.1/lib/ruby/3.4.0/cgi/core.rb:688:in 'Array#each'
/home/baku/.rbenv/versions/3.4.1/lib/ruby/3.4.0/cgi/core.rb:688:in 'block in CGI::QueryExtension#initialize_query'
/home/baku/.rbenv/versions/3.4.1/lib/ruby/3.4.0/cgi/core.rb:687:in 'Hash#each'
/home/baku/.rbenv/versions/3.4.1/lib/ruby/3.4.0/cgi/core.rb:687:in 'CGI::QueryExtension#initialize_query'
/home/baku/.rbenv/versions/3.4.1/lib/ruby/3.4.0/cgi/core.rb:871:in 'CGI#initialize'
/var/www/bakutek.net/WiKi/rnx/index.rb:86:in 'Class#new'
/var/www/bakutek.net/WiKi/rnx/index.rb:86:in 'Main#initialize'
/var/www/bakutek.net/WiKi/rnx/index.rb:841:in 'Class#new'
/var/www/bakutek.net/WiKi/rnx/index.rb:841:in '<main>'