Unable to ask for calendar permission on macOs

Question

I am trying to develop a local desktop application for macos and I want to ask for permission to access the calendar because I want to access the events that exist. Here you have my code https://github.com/fbarril/meeting-reminder, I followed all possible tutorials on the internet and still doesn't work. I am running the app on a macbook pro using macos sequiola . I get the following logged in the console:

Can't find or decode reasons
Failed to get or decode unavailable reasons
Button tapped!
Requesting calendar access...
Access denied.

I've also attached the signing & capabilities of the app

I can provide any additional info needed.