Unable to deploy TailwindCSS on a Rails 7 app to Heroku. Can someone please help me?

I'm currently trying to deploy my rails 6 application to Heroku.
I'm not sure where the error is coming from since the styles work well on development but break when pushing to production.

  rake aborted!

remote: SassC::SyntaxError: Error: File to import not found or unreadable: tailwindcss/base.
remote: on line 126:1 of stdin
remote: >> @import "tailwindcss/base";