Devise Invitable not reading subject key

[Ito-Eta]

In the Rails application I'm working on, nothing I'm doing seems to be getting the Devise Invitable gem to read the subject key on the mailer > invitation_instructions hash. I've tried simply changing the subject, no luck. I tried doing some of the things recommended in earlier issues that were resolved to simply override the normal methods and it doesn't see any changes when I do.

I simply need to change the subject line of the email to not say "Invitation Instructions". What am I doing wrong?

[scambra]

What did you try? Are you changing english i18n?
https://github.com/scambra/devise_invitable#i18n-