Message box does not collapse in Production

[Kok Hung Cheah]

Hi, I followed https://demo.creativebulma.net/components/bulma-collapsible/1.0/usage/#accordion . To create an accordion with multiple message boxes. In local, it works fine and it is great. However it does not collapse in production.

I deployed to Heroku as right now the app is in FREE tier.

Ruby: 2.7.0
Rails: 6.0
Bulma-collapsible: 1.0.4
Bulma: https://github.com/joshuajansen/bulma-rails

Do I need to install bulma npm packages? Or Bulma-rails is enough?

[Kok Hung Cheah]

I found the problem that bulma-rails somehow does not work. So I add a cdn script and it works well.