bots:preview crashes: unexpected token at '<?xml...'

[PabloCastellano]

I coded my own bot and it happens every time I run "turbot bots:preview":

$ turbot bots:preview
 !    Turbot client internal error.
 !    Report a bug at: https://github.com/openc/turbot-client/issues/new

    Error:       757: unexpected token at '<?xml version="1.0" encoding="UTF-8"?>
<hash>
  <status>404</status>
  <error>Not Found</error>
</hash>
' (JSON::ParserError)
    Backtrace:   /var/lib/gems/1.9.1/gems/json-1.8.3/lib/json/common.rb:155:in `parse'
                 /var/lib/gems/1.9.1/gems/json-1.8.3/lib/json/common.rb:155:in `parse'
                 /var/lib/gems/1.9.1/gems/turbot-api-0.0.17/lib/turbot/api/response.rb:8:in `initialize'
                 /var/lib/gems/1.9.1/gems/turbot-api-0.0.17/lib/turbot/api/response.rb:26:in `initialize'
                 /var/lib/gems/1.9.1/gems/turbot-api-0.0.17/lib/turbot/api.rb:119:in `new'
                 /var/lib/gems/1.9.1/gems/turbot-api-0.0.17/lib/turbot/api.rb:119:in `rescue in request'
                 /var/lib/gems/1.9.1/gems/turbot-api-0.0.17/lib/turbot/api.rb:109:in `request'
                 /var/lib/gems/1.9.1/gems/turbot-api-0.0.17/lib/turbot/api.rb:73:in `destroy_draft_data'
                 /var/lib/gems/1.9.1/gems/turbot-0.2.2/lib/turbot/command/bots.rb:323:in `preview'
                 /var/lib/gems/1.9.1/gems/turbot-0.2.2/lib/turbot/command.rb:106:in `run'
                 /var/lib/gems/1.9.1/gems/turbot-0.2.2/lib/turbot/cli.rb:16:in `start'
                 /var/lib/gems/1.9.1/gems/turbot-0.2.2/bin/turbot:3:in `<top (required)>'
                 /usr/local/bin/turbot:23:in `load'
                 /usr/local/bin/turbot:23:in `<main>'

    Command:     turbot bots:preview
    Version:     0.2.2 (x86_64-linux) ruby/1.9.3