Same bug as https://github.com/3scale/pisoni/issues/13 but with `AlertLimit` instead of `ServiceError`. In development locally, it raises this error when it does `ThreeScale::Core::AlertLimit.load_all(backend_id)` I can bypass it by changing this line: https://github.com/3scale/pisoni/blob/ff95af993f4b0acfcddfdeb6ca77fef2cf0eb3dd/lib/3scale/core/alert_limit.rb#L10 for: ```ruby (results[:attributes] || []).map { |attrs| new(attrs) } ``` So it is not urgent, but it is a bug that should be fixed anyway 😄