undefined method `fetch'

[matejaputic]

Running any command with slackcat results in:

/home/mp3t/.gem/ruby/2.3.0/gems/slackcat-0.2.5/bin/slackcat:118:in `block in <top (required)>': undefined method `fetch' for nil:NilClass (NoMethodError)
        from /home/mp3t/.gem/ruby/2.3.0/gems/slackcat-0.2.5/bin/slackcat:117:in `map'
        from /home/mp3t/.gem/ruby/2.3.0/gems/slackcat-0.2.5/bin/slackcat:117:in `<top (required)>'
        from /home/mp3t/.gem/ruby/2.3.0/bin/slackcat:23:in `load'
        from /home/mp3t/.gem/ruby/2.3.0/bin/slackcat:23:in `<main>'

[matejaputic]

Caveat: I do have the gem installed in a local directory

[crecord]

I am also having the same issue (ubuntu 16.04)