(sorry for my bad english, i'm french)
All the action pages lead to a 404 error.
I have desactived all plugins.
I have changed the theme with a common theme.
It's work when i choose permalink wich are like " /?p=123 ". But for SEO i need a better permalink like /%postname% for example.
Here his an example of an action page : http://devenir-coach.caplarge.com/subscription/confirmation-required/
Do you have an idea ?
Yhank you very much for your help !