/Library/Ruby/Gems/2.0.0/gems/cobweb-1.1.0/bin/cobweb:13:in `block in <top (required)>': undefined method `banner' for main:Object (NoMethodError)
from /Library/Ruby/Gems/2.0.0/gems/slop-4.2.1/lib/slop/options.rb:33:in `initialize'
from /Library/Ruby/Gems/2.0.0/gems/slop-4.2.1/lib/slop.rb:23:in `new'
from /Library/Ruby/Gems/2.0.0/gems/slop-4.2.1/lib/slop.rb:23:in `parse'
from /Library/Ruby/Gems/2.0.0/gems/cobweb-1.1.0/bin/cobweb:12:in `<top (required)>'
from /usr/local/bin/cobweb:23:in `load'
from /usr/local/bin/cobweb:23:in `<main>'
Running
cobweb
, I get this:I don't know what to do.