could not configure my account

[TheZeneUser]

every time when I try to configure my account with

mite configure "my email address" "my API key" I get the error:

"/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in require': cannot load such file -- iconv (LoadError) from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in require'
from /Library/Ruby/Gems/2.3.0/gems/activesupport-2.3.18/lib/active_support/inflector.rb:3:in <top (required)>' from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in require'
from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in require' from /Library/Ruby/Gems/2.3.0/gems/activesupport-2.3.18/lib/active_support/core_ext/integer/inflections.rb:1:in <top (required)>'
from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in require' from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in require'
from /Library/Ruby/Gems/2.3.0/gems/activesupport-2.3.18/lib/active_support/core_ext/integer.rb:2:in <top (required)>' from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in require'
from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in require' from /Library/Ruby/Gems/2.3.0/gems/activesupport-2.3.18/lib/active_support/core_ext.rb:8:in block in <top (required)>'
from /Library/Ruby/Gems/2.3.0/gems/activesupport-2.3.18/lib/active_support/core_ext.rb:8:in each' from /Library/Ruby/Gems/2.3.0/gems/activesupport-2.3.18/lib/active_support/core_ext.rb:8:in <top (required)>'
from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in require' from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in require'
from /Library/Ruby/Gems/2.3.0/gems/activesupport-2.3.18/lib/active_support.rb:56:in <top (required)>' from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in require'
from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in require' from /Library/Ruby/Gems/2.3.0/gems/mite-rb-0.4.5/lib/mite-rb.rb:1:in <top (required)>'
from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:127:in require' from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:127:in rescue in require'
from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:39:in require' from /Library/Ruby/Gems/2.3.0/gems/mite.cmd-0.1.12/lib/mite_cmd.rb:5:in <top (required)>'
from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in require' from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in require'
from /Library/Ruby/Gems/2.3.0/gems/mite.cmd-0.1.12/bin/mite:5:in <top (required)>' from /usr/local/bin/mite:22:in load'
from /usr/local/bin/mite:22:in `

'
"