cleanup:tokens webapp fails on cdev

AILS_ENV=production
0 3 * * * cd /srv/leap/webapp && bundle exec rake cleanup:tokens
leap-webapp@mudskipper:~$ cd /srv/leap/webapp && bundle exec rake cleanup:tokens
rake aborted!
LoadError: cannot load such file -- braintree
/srv/leap/webapp/engines/billing/lib/leap_web_billing/engine.rb:3:in `require'
/srv/leap/webapp/engines/billing/lib/leap_web_billing/engine.rb:3:in `'
/srv/leap/webapp/engines/billing/lib/leap_web_billing.rb:1:in `require'
/srv/leap/webapp/engines/billing/lib/leap_web_billing.rb:1:in `'
/srv/leap/webapp/config/application.rb:13:in `'
/srv/leap/webapp/Rakefile:15:in `require'
/srv/leap/webapp/Rakefile:15:in `'
(See full trace by running task with --trace)
leap-webapp@mudskipper:~$ exit

Didn't investigate if this is a configuration issue or something else, this is a clientdev machine, not sure if Azul is the right person?

(from redmine: created on 2016-05-12, closed on 2016-05-12)