I'm looking at an existing Rails project and trying to see what rake tasks exist by running rake -T. However, when I run that I get:
(in /var/www/project)
rake aborted!
undefined method `mattr_accessor' for Sentry:Module
/var/www/project/Rakefile:10
(See full trace by running task with --trace)
vendor/plugins/sentry/tasks/sentry.rake has nothing called mattr_accessor in it. What is this error message referring to?