Hi Afonso,
I believe you mean by Action button is the Action Menu component right?
I saw that in the New Component Marketplace Topic Thomas also posted a problem that happened with this new Action Menu ( The Component Marketplace 2.0 is live 🎉 - #7 by anon28807528 ) and Jesse said that theirs a repairing going ( The Component Marketplace 2.0 is live 🎉 - #72 by jessehaywood )!
The best is to Submit a support ticket!
Hope it will be fix soon!
Thank youb